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                  <a href="#GstMessage.object-hierarchy" class="shortcut">Object Hierarchy</a></span>
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<h2><span class="refentrytitle"><a name="GstMessage.top_of_page"></a>GstMessage</span></h2>
<p>GstMessage — Lightweight objects to signal the application of
                    pipeline events</p>
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<div class="refsect1">
<a name="GstMessage.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstMessage.html#GST-MESSAGE-SRC:CAPS" title="GST_MESSAGE_SRC()">GST_MESSAGE_SRC</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstMessage.html#GST-MESSAGE-SRC-NAME:CAPS" title="GST_MESSAGE_SRC_NAME()">GST_MESSAGE_SRC_NAME</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstMessage.html#GST-MESSAGE-TIMESTAMP:CAPS" title="GST_MESSAGE_TIMESTAMP()">GST_MESSAGE_TIMESTAMP</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstMessage.html#GST-MESSAGE-SEQNUM:CAPS" title="GST_MESSAGE_SEQNUM()">GST_MESSAGE_SEQNUM</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstMessage.html#GST-MESSAGE-TYPE:CAPS" title="GST_MESSAGE_TYPE()">GST_MESSAGE_TYPE</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstMessage.html#GST-MESSAGE-TYPE-IS-EXTENDED:CAPS" title="GST_MESSAGE_TYPE_IS_EXTENDED()">GST_MESSAGE_TYPE_IS_EXTENDED</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstMessage.html#GST-MESSAGE-TYPE-NAME:CAPS" title="GST_MESSAGE_TYPE_NAME()">GST_MESSAGE_TYPE_NAME</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="returnvalue">GQuark</span></a>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-type-to-quark" title="gst_message_type_to_quark ()">gst_message_type_to_quark</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-type-get-name" title="gst_message_type_get_name ()">gst_message_type_get_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-ref" title="gst_message_ref ()">gst_message_ref</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-unref" title="gst_message_unref ()">gst_message_unref</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-clear-message" title="gst_clear_message ()">gst_clear_message</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-copy" title="gst_message_copy ()">gst_message_copy</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-get-structure" title="gst_message_get_structure ()">gst_message_get_structure</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-writable-structure" title="gst_message_writable_structure ()">gst_message_writable_structure</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-make-writable" title="gst_message_make_writable()">gst_message_make_writable</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint32"><span class="returnvalue">guint32</span></a>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-get-seqnum" title="gst_message_get_seqnum ()">gst_message_get_seqnum</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-set-seqnum" title="gst_message_set_seqnum ()">gst_message_set_seqnum</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-has-name" title="gst_message_has_name ()">gst_message_has_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-is-writable" title="gst_message_is_writable()">gst_message_is_writable</a><span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-replace" title="gst_message_replace ()">gst_message_replace</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-take" title="gst_message_take ()">gst_message_take</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-eos" title="gst_message_new_eos ()">gst_message_new_eos</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-error" title="gst_message_new_error ()">gst_message_new_error</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-error-with-details" title="gst_message_new_error_with_details ()">gst_message_new_error_with_details</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-error" title="gst_message_parse_error ()">gst_message_parse_error</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-error-details" title="gst_message_parse_error_details ()">gst_message_parse_error_details</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-warning" title="gst_message_new_warning ()">gst_message_new_warning</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-warning-with-details" title="gst_message_new_warning_with_details ()">gst_message_new_warning_with_details</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-warning" title="gst_message_parse_warning ()">gst_message_parse_warning</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-warning-details" title="gst_message_parse_warning_details ()">gst_message_parse_warning_details</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-info" title="gst_message_new_info ()">gst_message_new_info</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-info-with-details" title="gst_message_new_info_with_details ()">gst_message_new_info_with_details</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-info" title="gst_message_parse_info ()">gst_message_parse_info</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-info-details" title="gst_message_parse_info_details ()">gst_message_parse_info_details</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-tag" title="gst_message_new_tag ()">gst_message_new_tag</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-tag" title="gst_message_parse_tag ()">gst_message_parse_tag</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-buffering" title="gst_message_new_buffering ()">gst_message_new_buffering</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-buffering" title="gst_message_parse_buffering ()">gst_message_parse_buffering</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-set-buffering-stats" title="gst_message_set_buffering_stats ()">gst_message_set_buffering_stats</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-buffering-stats" title="gst_message_parse_buffering_stats ()">gst_message_parse_buffering_stats</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-state-changed" title="gst_message_new_state_changed ()">gst_message_new_state_changed</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-state-changed" title="gst_message_parse_state_changed ()">gst_message_parse_state_changed</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-state-dirty" title="gst_message_new_state_dirty ()">gst_message_new_state_dirty</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-step-done" title="gst_message_new_step_done ()">gst_message_new_step_done</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-step-done" title="gst_message_parse_step_done ()">gst_message_parse_step_done</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-clock-provide" title="gst_message_new_clock_provide ()">gst_message_new_clock_provide</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-clock-provide" title="gst_message_parse_clock_provide ()">gst_message_parse_clock_provide</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-clock-lost" title="gst_message_new_clock_lost ()">gst_message_new_clock_lost</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-clock-lost" title="gst_message_parse_clock_lost ()">gst_message_parse_clock_lost</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-new-clock" title="gst_message_new_new_clock ()">gst_message_new_new_clock</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-new-clock" title="gst_message_parse_new_clock ()">gst_message_parse_new_clock</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-application" title="gst_message_new_application ()">gst_message_new_application</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-element" title="gst_message_new_element ()">gst_message_new_element</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-custom" title="gst_message_new_custom ()">gst_message_new_custom</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-segment-start" title="gst_message_new_segment_start ()">gst_message_new_segment_start</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-segment-start" title="gst_message_parse_segment_start ()">gst_message_parse_segment_start</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-segment-done" title="gst_message_new_segment_done ()">gst_message_new_segment_done</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-segment-done" title="gst_message_parse_segment_done ()">gst_message_parse_segment_done</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-duration-changed" title="gst_message_new_duration_changed ()">gst_message_new_duration_changed</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-latency" title="gst_message_new_latency ()">gst_message_new_latency</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-async-start" title="gst_message_new_async_start ()">gst_message_new_async_start</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-async-done" title="gst_message_new_async_done ()">gst_message_new_async_done</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-async-done" title="gst_message_parse_async_done ()">gst_message_parse_async_done</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-step-start" title="gst_message_new_step_start ()">gst_message_new_step_start</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-step-start" title="gst_message_parse_step_start ()">gst_message_parse_step_start</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-qos" title="gst_message_new_qos ()">gst_message_new_qos</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-set-qos-values" title="gst_message_set_qos_values ()">gst_message_set_qos_values</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-set-qos-stats" title="gst_message_set_qos_stats ()">gst_message_set_qos_stats</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-qos" title="gst_message_parse_qos ()">gst_message_parse_qos</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-qos-values" title="gst_message_parse_qos_values ()">gst_message_parse_qos_values</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-qos-stats" title="gst_message_parse_qos_stats ()">gst_message_parse_qos_stats</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-toc" title="gst_message_new_toc ()">gst_message_new_toc</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-toc" title="gst_message_parse_toc ()">gst_message_parse_toc</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-reset-time" title="gst_message_new_reset_time ()">gst_message_new_reset_time</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-reset-time" title="gst_message_parse_reset_time ()">gst_message_parse_reset_time</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-stream-start" title="gst_message_new_stream_start ()">gst_message_new_stream_start</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-set-group-id" title="gst_message_set_group_id ()">gst_message_set_group_id</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-group-id" title="gst_message_parse_group_id ()">gst_message_parse_group_id</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-stream-collection" title="gst_message_new_stream_collection ()">gst_message_new_stream_collection</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-stream-collection" title="gst_message_parse_stream_collection ()">gst_message_parse_stream_collection</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-structure-change" title="gst_message_new_structure_change ()">gst_message_new_structure_change</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-structure-change" title="gst_message_parse_structure_change ()">gst_message_parse_structure_change</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-request-state" title="gst_message_new_request_state ()">gst_message_new_request_state</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-request-state" title="gst_message_parse_request_state ()">gst_message_parse_request_state</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-stream-status" title="gst_message_new_stream_status ()">gst_message_new_stream_status</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-stream-status" title="gst_message_parse_stream_status ()">gst_message_parse_stream_status</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-set-stream-status-object" title="gst_message_set_stream_status_object ()">gst_message_set_stream_status_object</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="returnvalue">GValue</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-get-stream-status-object" title="gst_message_get_stream_status_object ()">gst_message_get_stream_status_object</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-progress" title="gst_message_new_progress ()">gst_message_new_progress</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-progress" title="gst_message_parse_progress ()">gst_message_parse_progress</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-need-context" title="gst_message_new_need_context ()">gst_message_new_need_context</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-context-type" title="gst_message_parse_context_type ()">gst_message_parse_context_type</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-have-context" title="gst_message_new_have_context ()">gst_message_new_have_context</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-have-context" title="gst_message_parse_have_context ()">gst_message_parse_have_context</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-device-added" title="gst_message_new_device_added ()">gst_message_new_device_added</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-device-removed" title="gst_message_new_device_removed ()">gst_message_new_device_removed</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-device-changed" title="gst_message_new_device_changed ()">gst_message_new_device_changed</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-device-added" title="gst_message_parse_device_added ()">gst_message_parse_device_added</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-device-removed" title="gst_message_parse_device_removed ()">gst_message_parse_device_removed</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-device-changed" title="gst_message_parse_device_changed ()">gst_message_parse_device_changed</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-property-notify" title="gst_message_new_property_notify ()">gst_message_new_property_notify</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-property-notify" title="gst_message_parse_property_notify ()">gst_message_parse_property_notify</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-streams-selected" title="gst_message_new_streams_selected ()">gst_message_new_streams_selected</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-streams-selected" title="gst_message_parse_streams_selected ()">gst_message_parse_streams_selected</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-streams-selected-add" title="gst_message_streams_selected_add ()">gst_message_streams_selected_add</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-streams-selected-get-size" title="gst_message_streams_selected_get_size ()">gst_message_streams_selected_get_size</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="gstreamer-GstStream.html#GstStream" title="struct GstStream"><span class="returnvalue">GstStream</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-streams-selected-get-stream" title="gst_message_streams_selected_get_stream ()">gst_message_streams_selected_get_stream</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-new-redirect" title="gst_message_new_redirect ()">gst_message_new_redirect</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-add-redirect-entry" title="gst_message_add_redirect_entry ()">gst_message_add_redirect_entry</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-parse-redirect-entry" title="gst_message_parse_redirect_entry ()">gst_message_parse_redirect_entry</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a>
</td>
<td class="function_name">
<a class="link" href="GstMessage.html#gst-message-get-num-redirect-entries" title="gst_message_get_num_redirect_entries ()">gst_message_get_num_redirect_entries</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GstMessage.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="GstMessage.html#GstMessage-struct" title="struct GstMessage">GstMessage</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstMessage.html#GstMessageType" title="enum GstMessageType">GstMessageType</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstMessage.html#GstStructureChangeType" title="enum GstStructureChangeType">GstStructureChangeType</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstMessage.html#GstStreamStatusType" title="enum GstStreamStatusType">GstStreamStatusType</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="GstMessage.html#GstProgressType" title="enum GstProgressType">GstProgressType</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GstMessage.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    <a href="/usr/share/gtk-doc/html/gobject/gobject-Boxed-Types.html">GBoxed</a>
    <span class="lineart">╰──</span> GstMessage
</pre>
</div>
<div class="refsect1">
<a name="GstMessage.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gst/gst.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="GstMessage.description"></a><h2>Description</h2>
<p>Messages are implemented as a subclass of <a class="link" href="gstreamer-GstMiniObject.html#GstMiniObject" title="struct GstMiniObject"><span class="type">GstMiniObject</span></a> with a generic
<a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> as the content. This allows for writing custom messages without
requiring an API change while allowing a wide range of different types
of messages.</p>
<p>Messages are posted by objects in the pipeline and are passed to the
application using the <a class="link" href="GstBus.html" title="GstBus"><span class="type">GstBus</span></a>.</p>
<p>The basic use pattern of posting a message on a <a class="link" href="GstBus.html" title="GstBus"><span class="type">GstBus</span></a> is as follows:</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="function"><a href="GstBus.html#gst-bus-post">gst_bus_post</a></span> <span class="gtkdoc opt">(</span>bus<span class="gtkdoc opt">,</span> <span class="function"><a href="GstMessage.html#gst-message-new-eos">gst_message_new_eos</a></span><span class="gtkdoc opt">());</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p></p>
<p>A <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> usually posts messages on the bus provided by the parent
container using <a class="link" href="GstElement.html#gst-element-post-message" title="gst_element_post_message ()"><code class="function">gst_element_post_message()</code></a>.</p>
</div>
<div class="refsect1">
<a name="GstMessage.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="GST-MESSAGE-SRC:CAPS"></a><h3>GST_MESSAGE_SRC()</h3>
<pre class="programlisting">#define GST_MESSAGE_SRC(message)        (GST_MESSAGE_CAST(message)-&gt;src)
</pre>
<p>Get the object that posted <em class="parameter"><code>message</code></em>
.</p>
<div class="refsect3">
<a name="GST-MESSAGE-SRC.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-MESSAGE-SRC-NAME:CAPS"></a><h3>GST_MESSAGE_SRC_NAME()</h3>
<pre class="programlisting">#define             GST_MESSAGE_SRC_NAME(message)</pre>
<p>Get the name of the object that posted <em class="parameter"><code>message</code></em>
. Returns "(NULL)" if
the message has no source object set.</p>
<div class="refsect3">
<a name="GST-MESSAGE-SRC-NAME.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-MESSAGE-TIMESTAMP:CAPS"></a><h3>GST_MESSAGE_TIMESTAMP()</h3>
<pre class="programlisting">#define GST_MESSAGE_TIMESTAMP(message)  (GST_MESSAGE_CAST(message)-&gt;timestamp)
</pre>
<p>Get the timestamp of <em class="parameter"><code>message</code></em>
. This is the timestamp when the message
was created.</p>
<div class="refsect3">
<a name="GST-MESSAGE-TIMESTAMP.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-MESSAGE-SEQNUM:CAPS"></a><h3>GST_MESSAGE_SEQNUM()</h3>
<pre class="programlisting">#define GST_MESSAGE_SEQNUM(message)     (GST_MESSAGE_CAST(message)-&gt;seqnum)
</pre>
<p>Get the sequence number of <em class="parameter"><code>message</code></em>
.</p>
<div class="refsect3">
<a name="GST-MESSAGE-SEQNUM.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-MESSAGE-TYPE:CAPS"></a><h3>GST_MESSAGE_TYPE()</h3>
<pre class="programlisting">#define GST_MESSAGE_TYPE(message)       (GST_MESSAGE_CAST(message)-&gt;type)
</pre>
<p>Get the <a class="link" href="GstMessage.html#GstMessageType" title="enum GstMessageType"><span class="type">GstMessageType</span></a> of <em class="parameter"><code>message</code></em>
.</p>
<div class="refsect3">
<a name="GST-MESSAGE-TYPE.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GST-MESSAGE-TYPE-IS-EXTENDED:CAPS"></a><h3>GST_MESSAGE_TYPE_IS_EXTENDED()</h3>
<pre class="programlisting">#define GST_MESSAGE_TYPE_IS_EXTENDED(message)       (!!(GST_MESSAGE_CAST(message)-&gt;type &amp; GST_MESSAGE_EXTENDED))
</pre>
<p>Check if the message is in the extended message group</p>
<div class="refsect3">
<a name="GST-MESSAGE-TYPE-IS-EXTENDED.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix08.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GST-MESSAGE-TYPE-NAME:CAPS"></a><h3>GST_MESSAGE_TYPE_NAME()</h3>
<pre class="programlisting">#define GST_MESSAGE_TYPE_NAME(message)  gst_message_type_get_name(GST_MESSAGE_TYPE(message))
</pre>
<p>Get a constant string representation of the <a class="link" href="GstMessage.html#GstMessageType" title="enum GstMessageType"><span class="type">GstMessageType</span></a> of <em class="parameter"><code>message</code></em>
.</p>
<div class="refsect3">
<a name="GST-MESSAGE-TYPE-NAME.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-type-to-quark"></a><h3>gst_message_type_to_quark ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Quarks.html#GQuark"><span class="returnvalue">GQuark</span></a>
gst_message_type_to_quark (<em class="parameter"><code><a class="link" href="GstMessage.html#GstMessageType" title="enum GstMessageType"><span class="type">GstMessageType</span></a> type</code></em>);</pre>
<p>Get the unique quark for the given message type.</p>
<div class="refsect3">
<a name="gst-message-type-to-quark.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>the message type</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-type-to-quark.returns"></a><h4>Returns</h4>
<p> the quark associated with the message type</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-type-get-name"></a><h3>gst_message_type_get_name ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_message_type_get_name (<em class="parameter"><code><a class="link" href="GstMessage.html#GstMessageType" title="enum GstMessageType"><span class="type">GstMessageType</span></a> type</code></em>);</pre>
<p>Get a printable name for the given message type. Do not modify or free.</p>
<div class="refsect3">
<a name="gst-message-type-get-name.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>the message type</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-type-get-name.returns"></a><h4>Returns</h4>
<p> a reference to the static name of the message.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-ref"></a><h3>gst_message_ref ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_ref (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *msg</code></em>);</pre>
<p>Convenience macro to increase the reference count of the message.</p>
<div class="refsect3">
<a name="gst-message-ref.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>msg</p></td>
<td class="parameter_description"><p>the message to ref</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-ref.returns"></a><h4>Returns</h4>
<p> <em class="parameter"><code>msg</code></em>
(for convenience when doing assignments)</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-unref"></a><h3>gst_message_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_unref (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *msg</code></em>);</pre>
<p>Convenience macro to decrease the reference count of the message, possibly
freeing it.</p>
<div class="refsect3">
<a name="gst-message-unref.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>msg</p></td>
<td class="parameter_description"><p>the message to unref</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-clear-message"></a><h3>gst_clear_message ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_clear_message (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> **msg_ptr</code></em>);</pre>
<p>Clears a reference to a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>.</p>
<p><em class="parameter"><code>msg_ptr</code></em>
 must not be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<p>If the reference is <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> then this function does nothing. Otherwise, the
reference count of the message is decreased and the pointer is set to <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<p><span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span></p>
<div class="refsect3">
<a name="gst-clear-message.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>msg_ptr</p></td>
<td class="parameter_description"><p>a pointer to a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> reference</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: 1.16</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-copy"></a><h3>gst_message_copy ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_copy (<em class="parameter"><code>const <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *msg</code></em>);</pre>
<p>Creates a copy of the message. Returns a copy of the message.</p>
<div class="refsect3">
<a name="gst-message-copy.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>msg</p></td>
<td class="parameter_description"><p>the message to copy</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-copy.returns"></a><h4>Returns</h4>
<p>a new copy of <em class="parameter"><code>msg</code></em>
.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-get-structure"></a><h3>gst_message_get_structure ()</h3>
<pre class="programlisting">const <a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
gst_message_get_structure (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>);</pre>
<p>Access the structure of the message.</p>
<div class="refsect3">
<a name="gst-message-get-structure.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>The <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-get-structure.returns"></a><h4>Returns</h4>
<p>The structure of the message. The
structure is still owned by the message, which means that you should not
free it and that the pointer becomes invalid when you free the message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-writable-structure"></a><h3>gst_message_writable_structure ()</h3>
<pre class="programlisting"><a class="link" href="GstStructure.html" title="GstStructure"><span class="returnvalue">GstStructure</span></a> *
gst_message_writable_structure (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>);</pre>
<p>Get a writable version of the structure.</p>
<div class="refsect3">
<a name="gst-message-writable-structure.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>The <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-writable-structure.returns"></a><h4>Returns</h4>
<p>The structure of the message. The structure
is still owned by the message, which means that you should not free
it and that the pointer becomes invalid when you free the message.
This function checks if <em class="parameter"><code>message</code></em>
is writable and will never return
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix03.html#api-index-1.14">1.14</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-make-writable"></a><h3>gst_message_make_writable()</h3>
<pre class="programlisting">#define         gst_message_make_writable(msg)  GST_MESSAGE_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (msg)))
</pre>
<p>Checks if a message is writable. If not, a writable copy is made and
returned.</p>
<div class="refsect3">
<a name="gst-message-make-writable.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>msg</p></td>
<td class="parameter_description"><p>the message to make writable. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-make-writable.returns"></a><h4>Returns</h4>
<p>a message (possibly a duplicate) that is writable.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-get-seqnum"></a><h3>gst_message_get_seqnum ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint32"><span class="returnvalue">guint32</span></a>
gst_message_get_seqnum (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>);</pre>
<p>Retrieve the sequence number of a message.</p>
<p>Messages have ever-incrementing sequence numbers, which may also be set
explicitly via <a class="link" href="GstMessage.html#gst-message-set-seqnum" title="gst_message_set_seqnum ()"><code class="function">gst_message_set_seqnum()</code></a>. Sequence numbers are typically used
to indicate that a message corresponds to some other set of messages or
events, for example a SEGMENT_DONE message corresponding to a SEEK event. It
is considered good practice to make this correspondence when possible, though
it is not required.</p>
<p>Note that events and messages share the same sequence number incrementor;
two events or messages will never have the same sequence number unless
that correspondence was made explicitly.</p>
<div class="refsect3">
<a name="gst-message-get-seqnum.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-get-seqnum.returns"></a><h4>Returns</h4>
<p> The message's sequence number.</p>
<p>MT safe.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-set-seqnum"></a><h3>gst_message_set_seqnum ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_set_seqnum (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint32"><span class="type">guint32</span></a> seqnum</code></em>);</pre>
<p>Set the sequence number of a message.</p>
<p>This function might be called by the creator of a message to indicate that
the message relates to other messages or events. See <a class="link" href="GstMessage.html#gst-message-get-seqnum" title="gst_message_get_seqnum ()"><code class="function">gst_message_get_seqnum()</code></a>
for more information.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-set-seqnum.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>seqnum</p></td>
<td class="parameter_description"><p>A sequence number.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-has-name"></a><h3>gst_message_has_name ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_message_has_name (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                      <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>);</pre>
<p>Checks if <em class="parameter"><code>message</code></em>
 has the given <em class="parameter"><code>name</code></em>
. This function is usually used to
check the name of a custom message.</p>
<div class="refsect3">
<a name="gst-message-has-name.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>The <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>name</p></td>
<td class="parameter_description"><p>name to check</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-has-name.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if <em class="parameter"><code>name</code></em>
matches the name of the message structure.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-is-writable"></a><h3>gst_message_is_writable()</h3>
<pre class="programlisting">#define         gst_message_is_writable(msg)     gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (msg))
</pre>
<p>Tests if you can safely write into a message's structure or validly
modify the seqnum and timestamp fields.</p>
<div class="refsect3">
<a name="gst-message-is-writable.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>msg</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-replace"></a><h3>gst_message_replace ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_message_replace (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> **old_message</code></em>,
                     <em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *new_message</code></em>);</pre>
<p>Modifies a pointer to a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> to point to a different <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>. The
modification is done atomically (so this is useful for ensuring thread safety
in some cases), and the reference counts are updated appropriately (the old
message is unreffed, the new one is reffed).</p>
<p>Either <em class="parameter"><code>new_message</code></em>
 or the <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> pointed to by <em class="parameter"><code>old_message</code></em>
 may be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<div class="refsect3">
<a name="gst-message-replace.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>old_message</p></td>
<td class="parameter_description"><p>pointer to a
pointer to a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> to be replaced. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input and for returning results. Default is transfer full."><span class="acronym">inout</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>new_message</p></td>
<td class="parameter_description"><p>pointer to a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> that will
replace the message pointed to by <em class="parameter"><code>old_message</code></em>
. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-replace.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if <em class="parameter"><code>new_message</code></em>
was different from <em class="parameter"><code>old_message</code></em>
</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-take"></a><h3>gst_message_take ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_message_take (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> **old_message</code></em>,
                  <em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *new_message</code></em>);</pre>
<p>Modifies a pointer to a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> to point to a different <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>. This
function is similar to <a class="link" href="GstMessage.html#gst-message-replace" title="gst_message_replace ()"><code class="function">gst_message_replace()</code></a> except that it takes ownership
of <em class="parameter"><code>new_message</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-take.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>old_message</p></td>
<td class="parameter_description"><p>pointer to a pointer to a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>
to be replaced. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for input and for returning results. Default is transfer full."><span class="acronym">inout</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>new_message</p></td>
<td class="parameter_description"><p>pointer to a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> that
will replace the message pointed to by <em class="parameter"><code>old_message</code></em>
. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-take.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if <em class="parameter"><code>new_message</code></em>
was different from <em class="parameter"><code>old_message</code></em>
</p>
</div>
<p class="since">Since: 1.16</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-eos"></a><h3>gst_message_new_eos ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_eos (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>);</pre>
<p>Create a new eos message. This message is generated and posted in
the sink elements of a GstBin. The bin will only forward the EOS
message to the application if all sinks have posted an EOS message.</p>
<div class="refsect3">
<a name="gst-message-new-eos.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-eos.returns"></a><h4>Returns</h4>
<p>The new eos message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-error"></a><h3>gst_message_new_error ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_error (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> *error</code></em>,
                       <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *debug</code></em>);</pre>
<p>Create a new error message. The message will copy <em class="parameter"><code>error</code></em>
 and
<em class="parameter"><code>debug</code></em>
. This message is posted by element when a fatal event
occurred. The pipeline will probably (partially) stop. The application
receiving this message should stop the pipeline.</p>
<div class="refsect3">
<a name="gst-message-new-error.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>The GError for this message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>debug</p></td>
<td class="parameter_description"><p>A debugging string.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-error.returns"></a><h4>Returns</h4>
<p>the new error message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-error-with-details"></a><h3>gst_message_new_error_with_details ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_error_with_details (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> *error</code></em>,
                                    <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *debug</code></em>,
                                    <em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *details</code></em>);</pre>
<p>Create a new error message. The message will copy <em class="parameter"><code>error</code></em>
 and
<em class="parameter"><code>debug</code></em>
. This message is posted by element when a fatal event
occurred. The pipeline will probably (partially) stop. The application
receiving this message should stop the pipeline.</p>
<div class="refsect3">
<a name="gst-message-new-error-with-details.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>The GError for this message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>debug</p></td>
<td class="parameter_description"><p>A debugging string.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>details</p></td>
<td class="parameter_description"><p>A GstStructure with details. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-error-with-details.returns"></a><h4>Returns</h4>
<p>the new error message. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-error"></a><h3>gst_message_parse_error ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_error (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **gerror</code></em>,
                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **debug</code></em>);</pre>
<p>Extracts the GError and debug string from the GstMessage. The values returned
in the output arguments are copies; the caller must free them when done.</p>
<p>Typical usage of this function might be:</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="gtkdoc opt">...</span>
<span class="keyword">switch</span> <span class="gtkdoc opt">(</span><span class="function"><a href="GstMessage.html#GST-MESSAGE-TYPE:CAPS">GST_MESSAGE_TYPE</a></span> <span class="gtkdoc opt">(</span>msg<span class="gtkdoc opt">)) {</span>
  <span class="keyword">case</span> GST_MESSAGE_ERROR<span class="gtkdoc opt">: {</span>
    GError <span class="gtkdoc opt">*</span>err <span class="gtkdoc opt">=</span> NULL<span class="gtkdoc opt">;</span>
    gchar <span class="gtkdoc opt">*</span>dbg_info <span class="gtkdoc opt">=</span> NULL<span class="gtkdoc opt">;</span>

    <span class="function"><a href="GstMessage.html#gst-message-parse-error">gst_message_parse_error</a></span> <span class="gtkdoc opt">(</span>msg<span class="gtkdoc opt">, &amp;</span>err<span class="gtkdoc opt">, &amp;</span>dbg_info<span class="gtkdoc opt">);</span>
    <span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Warnings-and-Assertions.html#g-printerr">g_printerr</a></span> <span class="gtkdoc opt">(</span><span class="string">&quot;ERROR from element %s: %s</span><span class="gtkdoc esc">\n</span><span class="string">&quot;</span><span class="gtkdoc opt">,</span>
        <span class="function"><a href="GstObject.html#GST-OBJECT-NAME:CAPS">GST_OBJECT_NAME</a></span> <span class="gtkdoc opt">(</span>msg<span class="gtkdoc opt">-&gt;</span>src<span class="gtkdoc opt">),</span> err<span class="gtkdoc opt">-&gt;</span>message<span class="gtkdoc opt">);</span>
    <span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Warnings-and-Assertions.html#g-printerr">g_printerr</a></span> <span class="gtkdoc opt">(</span><span class="string">&quot;Debugging info: %s</span><span class="gtkdoc esc">\n</span><span class="string">&quot;</span><span class="gtkdoc opt">, (</span>dbg_info<span class="gtkdoc opt">) ?</span> dbg_info <span class="gtkdoc opt">:</span> <span class="string">&quot;none&quot;</span><span class="gtkdoc opt">);</span>
    <span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#g-error-free">g_error_free</a></span> <span class="gtkdoc opt">(</span>err<span class="gtkdoc opt">);</span>
    <span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Memory-Allocation.html#g-free">g_free</a></span> <span class="gtkdoc opt">(</span>dbg_info<span class="gtkdoc opt">);</span>
    <span class="keyword">break</span><span class="gtkdoc opt">;</span>
  <span class="gtkdoc opt">}</span>
  <span class="gtkdoc opt">...</span>
<span class="gtkdoc opt">}</span>
<span class="gtkdoc opt">...</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p></p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-error.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_ERROR.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>gerror</p></td>
<td class="parameter_description"><p>location for the GError. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>debug</p></td>
<td class="parameter_description"><p>location for the debug message,
or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-error-details"></a><h3>gst_message_parse_error_details ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_error_details (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                 <em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> **structure</code></em>);</pre>
<p>Returns the optional details structure, may be NULL if none.
The returned structure must not be freed.</p>
<div class="refsect3">
<a name="gst-message-parse-error-details.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>The message object</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>A pointer to the returned details. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-warning"></a><h3>gst_message_new_warning ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_warning (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> *error</code></em>,
                         <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *debug</code></em>);</pre>
<p>Create a new warning message. The message will make copies of <em class="parameter"><code>error</code></em>
 and
<em class="parameter"><code>debug</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-new-warning.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>The GError for this message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>debug</p></td>
<td class="parameter_description"><p>A debugging string.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-warning.returns"></a><h4>Returns</h4>
<p>the new warning message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-warning-with-details"></a><h3>gst_message_new_warning_with_details ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_warning_with_details (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> *error</code></em>,
                                      <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *debug</code></em>,
                                      <em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *details</code></em>);</pre>
<p>Create a new warning message. The message will make copies of <em class="parameter"><code>error</code></em>
 and
<em class="parameter"><code>debug</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-new-warning-with-details.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>The GError for this message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>debug</p></td>
<td class="parameter_description"><p>A debugging string.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>details</p></td>
<td class="parameter_description"><p>A GstStructure with details. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-warning-with-details.returns"></a><h4>Returns</h4>
<p>the new warning message. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-warning"></a><h3>gst_message_parse_warning ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_warning (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **gerror</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **debug</code></em>);</pre>
<p>Extracts the GError and debug string from the GstMessage. The values returned
in the output arguments are copies; the caller must free them when done.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-warning.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_WARNING.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>gerror</p></td>
<td class="parameter_description"><p>location for the GError. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>debug</p></td>
<td class="parameter_description"><p>location for the debug message,
or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-warning-details"></a><h3>gst_message_parse_warning_details ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_warning_details (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                   <em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> **structure</code></em>);</pre>
<p>Returns the optional details structure, may be NULL if none
The returned structure must not be freed.</p>
<div class="refsect3">
<a name="gst-message-parse-warning-details.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>The message object</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>A pointer to the returned details structure. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-info"></a><h3>gst_message_new_info ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_info (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                      <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> *error</code></em>,
                      <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *debug</code></em>);</pre>
<p>Create a new info message. The message will make copies of <em class="parameter"><code>error</code></em>
 and
<em class="parameter"><code>debug</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-new-info.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>The GError for this message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>debug</p></td>
<td class="parameter_description"><p>A debugging string.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-info.returns"></a><h4>Returns</h4>
<p>the new info message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-info-with-details"></a><h3>gst_message_new_info_with_details ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_info_with_details (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> *error</code></em>,
                                   <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *debug</code></em>,
                                   <em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *details</code></em>);</pre>
<p>Create a new info message. The message will make copies of <em class="parameter"><code>error</code></em>
 and
<em class="parameter"><code>debug</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-new-info-with-details.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>The GError for this message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>debug</p></td>
<td class="parameter_description"><p>A debugging string.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>details</p></td>
<td class="parameter_description"><p>A GstStructure with details. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-info-with-details.returns"></a><h4>Returns</h4>
<p>the new warning message. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-info"></a><h3>gst_message_parse_info ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_info (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError"><span class="type">GError</span></a> **gerror</code></em>,
                        <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **debug</code></em>);</pre>
<p>Extracts the GError and debug string from the GstMessage. The values returned
in the output arguments are copies; the caller must free them when done.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-info.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_INFO.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>gerror</p></td>
<td class="parameter_description"><p>location for the GError. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>debug</p></td>
<td class="parameter_description"><p>location for the debug message,
or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-info-details"></a><h3>gst_message_parse_info_details ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_info_details (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                <em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> **structure</code></em>);</pre>
<p>Returns the optional details structure, may be NULL if none
The returned structure must not be freed.</p>
<div class="refsect3">
<a name="gst-message-parse-info-details.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>The message object</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>A pointer to the returned details structure. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-tag"></a><h3>gst_message_new_tag ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_tag (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                     <em class="parameter"><code><a class="link" href="GstTagList.html" title="GstTagList"><span class="type">GstTagList</span></a> *tag_list</code></em>);</pre>
<p>Create a new tag message. The message will take ownership of the tag list.
The message is posted by elements that discovered a new taglist.</p>
<div class="refsect3">
<a name="gst-message-new-tag.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>tag_list</p></td>
<td class="parameter_description"><p>the tag list for the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-tag.returns"></a><h4>Returns</h4>
<p>the new tag message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-tag"></a><h3>gst_message_parse_tag ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_tag (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                       <em class="parameter"><code><a class="link" href="GstTagList.html" title="GstTagList"><span class="type">GstTagList</span></a> **tag_list</code></em>);</pre>
<p>Extracts the tag list from the GstMessage. The tag list returned in the
output argument is a copy; the caller must free it when done.</p>
<p>Typical usage of this function might be:</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7
8
9
10
11
12
13
14</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="gtkdoc opt">...</span>
<span class="keyword">switch</span> <span class="gtkdoc opt">(</span><span class="function"><a href="GstMessage.html#GST-MESSAGE-TYPE:CAPS">GST_MESSAGE_TYPE</a></span> <span class="gtkdoc opt">(</span>msg<span class="gtkdoc opt">)) {</span>
  <span class="keyword">case</span> GST_MESSAGE_TAG<span class="gtkdoc opt">: {</span>
    GstTagList <span class="gtkdoc opt">*</span>tags <span class="gtkdoc opt">=</span> NULL<span class="gtkdoc opt">;</span>

    <span class="function"><a href="GstMessage.html#gst-message-parse-tag">gst_message_parse_tag</a></span> <span class="gtkdoc opt">(</span>msg<span class="gtkdoc opt">, &amp;</span>tags<span class="gtkdoc opt">);</span>
    <span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Warnings-and-Assertions.html#g-print">g_print</a></span> <span class="gtkdoc opt">(</span><span class="string">&quot;Got tags from element %s</span><span class="gtkdoc esc">\n</span><span class="string">&quot;</span><span class="gtkdoc opt">,</span> <span class="function"><a href="GstObject.html#GST-OBJECT-NAME:CAPS">GST_OBJECT_NAME</a></span> <span class="gtkdoc opt">(</span>msg<span class="gtkdoc opt">-&gt;</span>src<span class="gtkdoc opt">));</span>
    <span class="function">handle_tags</span> <span class="gtkdoc opt">(</span>tags<span class="gtkdoc opt">);</span>
    <span class="function"><a href="GstTagList.html#gst-tag-list-unref">gst_tag_list_unref</a></span> <span class="gtkdoc opt">(</span>tags<span class="gtkdoc opt">);</span>
    <span class="keyword">break</span><span class="gtkdoc opt">;</span>
  <span class="gtkdoc opt">}</span>
  <span class="gtkdoc opt">...</span>
<span class="gtkdoc opt">}</span>
<span class="gtkdoc opt">...</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p></p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-tag.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_TAG.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>tag_list</p></td>
<td class="parameter_description"><p>return location for the tag-list. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Out parameter, where caller must allocate storage."><span class="acronym">out callee-allocates</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-buffering"></a><h3>gst_message_new_buffering ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_buffering (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> percent</code></em>);</pre>
<p>Create a new buffering message. This message can be posted by an element that
needs to buffer data before it can continue processing. <em class="parameter"><code>percent</code></em>
 should be a
value between 0 and 100. A value of 100 means that the buffering completed.</p>
<p>When <em class="parameter"><code>percent</code></em>
 is &lt; 100 the application should PAUSE a PLAYING pipeline. When
<em class="parameter"><code>percent</code></em>
 is 100, the application can set the pipeline (back) to PLAYING.
The application must be prepared to receive BUFFERING messages in the
PREROLLING state and may only set the pipeline to PLAYING after receiving a
message with <em class="parameter"><code>percent</code></em>
 set to 100, which can happen after the pipeline
completed prerolling.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-new-buffering.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>percent</p></td>
<td class="parameter_description"><p>The buffering percent</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-buffering.returns"></a><h4>Returns</h4>
<p>The new buffering message. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-buffering"></a><h3>gst_message_parse_buffering ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_buffering (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *percent</code></em>);</pre>
<p>Extracts the buffering percent from the GstMessage. see also
<a class="link" href="GstMessage.html#gst-message-new-buffering" title="gst_message_new_buffering ()"><code class="function">gst_message_new_buffering()</code></a>.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-buffering.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_BUFFERING.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>percent</p></td>
<td class="parameter_description"><p>Return location for the percent. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-set-buffering-stats"></a><h3>gst_message_set_buffering_stats ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_set_buffering_stats (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstQuery.html#GstBufferingMode" title="enum GstBufferingMode"><span class="type">GstBufferingMode</span></a> mode</code></em>,
                                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> avg_in</code></em>,
                                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> avg_out</code></em>,
                                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> buffering_left</code></em>);</pre>
<p>Configures the buffering stats values in <em class="parameter"><code>message</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-set-buffering-stats.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_BUFFERING.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>mode</p></td>
<td class="parameter_description"><p>a buffering mode</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>avg_in</p></td>
<td class="parameter_description"><p>the average input rate</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>avg_out</p></td>
<td class="parameter_description"><p>the average output rate</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>buffering_left</p></td>
<td class="parameter_description"><p>amount of buffering time left in milliseconds</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-buffering-stats"></a><h3>gst_message_parse_buffering_stats ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_buffering_stats (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                   <em class="parameter"><code><a class="link" href="GstQuery.html#GstBufferingMode" title="enum GstBufferingMode"><span class="type">GstBufferingMode</span></a> *mode</code></em>,
                                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *avg_in</code></em>,
                                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *avg_out</code></em>,
                                   <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> *buffering_left</code></em>);</pre>
<p>Extracts the buffering stats values from <em class="parameter"><code>message</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-parse-buffering-stats.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_BUFFERING.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>mode</p></td>
<td class="parameter_description"><p>a buffering mode, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>avg_in</p></td>
<td class="parameter_description"><p>the average input rate, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>avg_out</p></td>
<td class="parameter_description"><p>the average output rate, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>buffering_left</p></td>
<td class="parameter_description"><p>amount of buffering time left in
milliseconds, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-state-changed"></a><h3>gst_message_new_state_changed ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_state_changed (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                               <em class="parameter"><code><a class="link" href="GstElement.html#GstState" title="enum GstState"><span class="type">GstState</span></a> oldstate</code></em>,
                               <em class="parameter"><code><a class="link" href="GstElement.html#GstState" title="enum GstState"><span class="type">GstState</span></a> newstate</code></em>,
                               <em class="parameter"><code><a class="link" href="GstElement.html#GstState" title="enum GstState"><span class="type">GstState</span></a> pending</code></em>);</pre>
<p>Create a state change message. This message is posted whenever an element
changed its state.</p>
<div class="refsect3">
<a name="gst-message-new-state-changed.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>oldstate</p></td>
<td class="parameter_description"><p>the previous state</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>newstate</p></td>
<td class="parameter_description"><p>the new (current) state</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>pending</p></td>
<td class="parameter_description"><p>the pending (target) state</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-state-changed.returns"></a><h4>Returns</h4>
<p>the new state change message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-state-changed"></a><h3>gst_message_parse_state_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_state_changed (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstElement.html#GstState" title="enum GstState"><span class="type">GstState</span></a> *oldstate</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstElement.html#GstState" title="enum GstState"><span class="type">GstState</span></a> *newstate</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstElement.html#GstState" title="enum GstState"><span class="type">GstState</span></a> *pending</code></em>);</pre>
<p>Extracts the old and new states from the GstMessage.</p>
<p>Typical usage of this function might be:</p>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7
8
9
10
11
12
13
14
15</pre></td>
        <td class="listing_code"><pre class="programlisting"><span class="gtkdoc opt">...</span>
<span class="keyword">switch</span> <span class="gtkdoc opt">(</span><span class="function"><a href="GstMessage.html#GST-MESSAGE-TYPE:CAPS">GST_MESSAGE_TYPE</a></span> <span class="gtkdoc opt">(</span>msg<span class="gtkdoc opt">)) {</span>
  <span class="keyword">case</span> GST_MESSAGE_STATE_CHANGED<span class="gtkdoc opt">: {</span>
    GstState old_state<span class="gtkdoc opt">,</span> new_state<span class="gtkdoc opt">;</span>

    <span class="function"><a href="GstMessage.html#gst-message-parse-state-changed">gst_message_parse_state_changed</a></span> <span class="gtkdoc opt">(</span>msg<span class="gtkdoc opt">, &amp;</span>old_state<span class="gtkdoc opt">, &amp;</span>new_state<span class="gtkdoc opt">,</span> NULL<span class="gtkdoc opt">);</span>
    <span class="function"><a href="/usr/share/gtk-doc/html/glib/glib-Warnings-and-Assertions.html#g-print">g_print</a></span> <span class="gtkdoc opt">(</span><span class="string">&quot;Element %s changed state from %s to %s.</span><span class="gtkdoc esc">\n</span><span class="string">&quot;</span><span class="gtkdoc opt">,</span>
        <span class="function"><a href="GstObject.html#GST-OBJECT-NAME:CAPS">GST_OBJECT_NAME</a></span> <span class="gtkdoc opt">(</span>msg<span class="gtkdoc opt">-&gt;</span>src<span class="gtkdoc opt">),</span>
        <span class="function"><a href="GstElement.html#gst-element-state-get-name">gst_element_state_get_name</a></span> <span class="gtkdoc opt">(</span>old_state<span class="gtkdoc opt">),</span>
        <span class="function"><a href="GstElement.html#gst-element-state-get-name">gst_element_state_get_name</a></span> <span class="gtkdoc opt">(</span>new_state<span class="gtkdoc opt">));</span>
    <span class="keyword">break</span><span class="gtkdoc opt">;</span>
  <span class="gtkdoc opt">}</span>
  <span class="gtkdoc opt">...</span>
<span class="gtkdoc opt">}</span>
<span class="gtkdoc opt">...</span></pre></td>
      </tr>
    </tbody>
  </table>
</div>

<p></p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-state-changed.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_STATE_CHANGED</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>oldstate</p></td>
<td class="parameter_description"><p>the previous state, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>newstate</p></td>
<td class="parameter_description"><p>the new (current) state, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>pending</p></td>
<td class="parameter_description"><p>the pending (target) state, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-state-dirty"></a><h3>gst_message_new_state_dirty ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_state_dirty (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>);</pre>
<p>Create a state dirty message. This message is posted whenever an element
changed its state asynchronously and is used internally to update the
states of container objects.</p>
<div class="refsect3">
<a name="gst-message-new-state-dirty.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-state-dirty.returns"></a><h4>Returns</h4>
<p>the new state dirty message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-step-done"></a><h3>gst_message_new_step_done ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_step_done (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                           <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> format</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> amount</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> rate</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> flush</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> intermediate</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> duration</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> eos</code></em>);</pre>
<p>This message is posted by elements when they complete a part, when <em class="parameter"><code>intermediate</code></em>
 set
to <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>, or a complete step operation.</p>
<p><em class="parameter"><code>duration</code></em>
 will contain the amount of time (in GST_FORMAT_TIME) of the stepped
<em class="parameter"><code>amount</code></em>
 of media in format <em class="parameter"><code>format</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-new-step-done.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>the format of <em class="parameter"><code>amount</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>amount</p></td>
<td class="parameter_description"><p>the amount of stepped data</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>rate</p></td>
<td class="parameter_description"><p>the rate of the stepped amount</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>flush</p></td>
<td class="parameter_description"><p>is this an flushing step</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>intermediate</p></td>
<td class="parameter_description"><p>is this an intermediate step</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>duration</p></td>
<td class="parameter_description"><p>the duration of the data</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>eos</p></td>
<td class="parameter_description"><p>the step caused EOS</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-step-done.returns"></a><h4>Returns</h4>
<p>the new step_done message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-step-done"></a><h3>gst_message_parse_step_done ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_step_done (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                             <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> *format</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> *amount</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *rate</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *flush</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *intermediate</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> *duration</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *eos</code></em>);</pre>
<p>Extract the values the step_done message.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-step-done.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_STEP_DONE.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>result location for the format. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>amount</p></td>
<td class="parameter_description"><p>result location for the amount. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>rate</p></td>
<td class="parameter_description"><p>result location for the rate. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>flush</p></td>
<td class="parameter_description"><p>result location for the flush flag. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>intermediate</p></td>
<td class="parameter_description"><p>result location for the intermediate flag. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>duration</p></td>
<td class="parameter_description"><p>result location for the duration. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>eos</p></td>
<td class="parameter_description"><p>result location for the EOS flag. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-clock-provide"></a><h3>gst_message_new_clock_provide ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_clock_provide (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                               <em class="parameter"><code><a class="link" href="GstClock.html" title="GstClock"><span class="type">GstClock</span></a> *clock</code></em>,
                               <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> ready</code></em>);</pre>
<p>Create a clock provide message. This message is posted whenever an
element is ready to provide a clock or lost its ability to provide
a clock (maybe because it paused or became EOS).</p>
<p>This message is mainly used internally to manage the clock
selection.</p>
<div class="refsect3">
<a name="gst-message-new-clock-provide.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>clock</p></td>
<td class="parameter_description"><p>the clock it provides. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>ready</p></td>
<td class="parameter_description"><p><a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the sender can provide a clock</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-clock-provide.returns"></a><h4>Returns</h4>
<p>the new provide clock message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-clock-provide"></a><h3>gst_message_parse_clock_provide ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_clock_provide (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstClock.html" title="GstClock"><span class="type">GstClock</span></a> **clock</code></em>,
                                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *ready</code></em>);</pre>
<p>Extracts the clock and ready flag from the GstMessage.
The clock object returned remains valid until the message is freed.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-clock-provide.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_CLOCK_PROVIDE.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>clock</p></td>
<td class="parameter_description"><p>a pointer to  hold a clock
object, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>ready</p></td>
<td class="parameter_description"><p>a pointer to hold the ready flag, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-clock-lost"></a><h3>gst_message_new_clock_lost ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_clock_lost (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                            <em class="parameter"><code><a class="link" href="GstClock.html" title="GstClock"><span class="type">GstClock</span></a> *clock</code></em>);</pre>
<p>Create a clock lost message. This message is posted whenever the
clock is not valid anymore.</p>
<p>If this message is posted by the pipeline, the pipeline will
select a new clock again when it goes to PLAYING. It might therefore
be needed to set the pipeline to PAUSED and PLAYING again.</p>
<div class="refsect3">
<a name="gst-message-new-clock-lost.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>clock</p></td>
<td class="parameter_description"><p>the clock that was lost. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-clock-lost.returns"></a><h4>Returns</h4>
<p>The new clock lost message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-clock-lost"></a><h3>gst_message_parse_clock_lost ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_clock_lost (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                              <em class="parameter"><code><a class="link" href="GstClock.html" title="GstClock"><span class="type">GstClock</span></a> **clock</code></em>);</pre>
<p>Extracts the lost clock from the GstMessage.
The clock object returned remains valid until the message is freed.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-clock-lost.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_CLOCK_LOST.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>clock</p></td>
<td class="parameter_description"><p>a pointer to hold the lost clock. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-new-clock"></a><h3>gst_message_new_new_clock ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_new_clock (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                           <em class="parameter"><code><a class="link" href="GstClock.html" title="GstClock"><span class="type">GstClock</span></a> *clock</code></em>);</pre>
<p>Create a new clock message. This message is posted whenever the
pipeline selects a new clock for the pipeline.</p>
<div class="refsect3">
<a name="gst-message-new-new-clock.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>clock</p></td>
<td class="parameter_description"><p>the new selected clock. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-new-clock.returns"></a><h4>Returns</h4>
<p>The new new clock message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-new-clock"></a><h3>gst_message_parse_new_clock ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_new_clock (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                             <em class="parameter"><code><a class="link" href="GstClock.html" title="GstClock"><span class="type">GstClock</span></a> **clock</code></em>);</pre>
<p>Extracts the new clock from the GstMessage.
The clock object returned remains valid until the message is freed.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-new-clock.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_NEW_CLOCK.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>clock</p></td>
<td class="parameter_description"><p>a pointer to hold the selected
new clock. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-application"></a><h3>gst_message_new_application ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_application (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                             <em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>);</pre>
<p>Create a new application-typed message. GStreamer will never create these
messages; they are a gift from us to you. Enjoy.</p>
<div class="refsect3">
<a name="gst-message-new-application.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>the structure for the message. The message
will take ownership of the structure. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-application.returns"></a><h4>Returns</h4>
<p>The new application message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-element"></a><h3>gst_message_new_element ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_element (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                         <em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>);</pre>
<p>Create a new element-specific message. This is meant as a generic way of
allowing one-way communication from an element to an application, for example
"the firewire cable was unplugged". The format of the message should be
documented in the element's documentation. The structure field can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<div class="refsect3">
<a name="gst-message-new-element.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>The structure for the
message. The message will take ownership of the structure. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-element.returns"></a><h4>Returns</h4>
<p>The new element message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-custom"></a><h3>gst_message_new_custom ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_custom (<em class="parameter"><code><a class="link" href="GstMessage.html#GstMessageType" title="enum GstMessageType"><span class="type">GstMessageType</span></a> type</code></em>,
                        <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                        <em class="parameter"><code><a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *structure</code></em>);</pre>
<p>Create a new custom-typed message. This can be used for anything not
handled by other message-specific functions to pass a message to the
app. The structure field can be <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</p>
<div class="refsect3">
<a name="gst-message-new-custom.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>The <a class="link" href="GstMessage.html#GstMessageType" title="enum GstMessageType"><span class="type">GstMessageType</span></a> to distinguish messages</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>structure</p></td>
<td class="parameter_description"><p>the structure for the
message. The message will take ownership of the structure. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-custom.returns"></a><h4>Returns</h4>
<p>The new message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-segment-start"></a><h3>gst_message_new_segment_start ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_segment_start (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                               <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> format</code></em>,
                               <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> position</code></em>);</pre>
<p>Create a new segment message. This message is posted by elements that
start playback of a segment as a result of a segment seek. This message
is not received by the application but is used for maintenance reasons in
container elements.</p>
<div class="refsect3">
<a name="gst-message-new-segment-start.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>The format of the position being played</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>position</p></td>
<td class="parameter_description"><p>The position of the segment being played</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-segment-start.returns"></a><h4>Returns</h4>
<p>the new segment start message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-segment-start"></a><h3>gst_message_parse_segment_start ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_segment_start (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                 <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> *format</code></em>,
                                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> *position</code></em>);</pre>
<p>Extracts the position and format from the segment start message.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-segment-start.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_SEGMENT_START.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>Result location for the format, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>position</p></td>
<td class="parameter_description"><p>Result location for the position, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-segment-done"></a><h3>gst_message_new_segment_done ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_segment_done (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                              <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> format</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> position</code></em>);</pre>
<p>Create a new segment done message. This message is posted by elements that
finish playback of a segment as a result of a segment seek. This message
is received by the application after all elements that posted a segment_start
have posted the segment_done.</p>
<div class="refsect3">
<a name="gst-message-new-segment-done.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>The format of the position being done</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>position</p></td>
<td class="parameter_description"><p>The position of the segment being done</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-segment-done.returns"></a><h4>Returns</h4>
<p>the new segment done message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-segment-done"></a><h3>gst_message_parse_segment_done ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_segment_done (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> *format</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> *position</code></em>);</pre>
<p>Extracts the position and format from the segment done message.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-segment-done.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_SEGMENT_DONE.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>Result location for the format, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>position</p></td>
<td class="parameter_description"><p>Result location for the position, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-duration-changed"></a><h3>gst_message_new_duration_changed ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_duration_changed (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>);</pre>
<p>Create a new duration changed message. This message is posted by elements
that know the duration of a stream when the duration changes. This message
is received by bins and is used to calculate the total duration of a
pipeline.</p>
<div class="refsect3">
<a name="gst-message-new-duration-changed.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-duration-changed.returns"></a><h4>Returns</h4>
<p>The new duration-changed message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-latency"></a><h3>gst_message_new_latency ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_latency (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>);</pre>
<p>This message can be posted by elements when their latency requirements have
changed.</p>
<div class="refsect3">
<a name="gst-message-new-latency.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-latency.returns"></a><h4>Returns</h4>
<p>The new latency message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-async-start"></a><h3>gst_message_new_async_start ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_async_start (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>);</pre>
<p>This message is posted by elements when they start an ASYNC state change.</p>
<div class="refsect3">
<a name="gst-message-new-async-start.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-async-start.returns"></a><h4>Returns</h4>
<p>The new async_start message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-async-done"></a><h3>gst_message_new_async_done ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_async_done (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                            <em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> running_time</code></em>);</pre>
<p>The message is posted when elements completed an ASYNC state change.
<em class="parameter"><code>running_time</code></em>
 contains the time of the desired running_time when this
elements goes to PLAYING. A value of <a class="link" href="GstClock.html#GST-CLOCK-TIME-NONE:CAPS" title="GST_CLOCK_TIME_NONE"><span class="type">GST_CLOCK_TIME_NONE</span></a> for <em class="parameter"><code>running_time</code></em>

means that the element has no clock interaction and thus doesn't care about
the running_time of the pipeline.</p>
<div class="refsect3">
<a name="gst-message-new-async-done.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>running_time</p></td>
<td class="parameter_description"><p>the desired running_time</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-async-done.returns"></a><h4>Returns</h4>
<p>The new async_done message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-async-done"></a><h3>gst_message_parse_async_done ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_async_done (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                              <em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> *running_time</code></em>);</pre>
<p>Extract the running_time from the async_done message.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-async-done.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_ASYNC_DONE.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>running_time</p></td>
<td class="parameter_description"><p>Result location for the running_time or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-step-start"></a><h3>gst_message_new_step_start ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_step_start (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> active</code></em>,
                            <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> format</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> amount</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> rate</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> flush</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> intermediate</code></em>);</pre>
<p>This message is posted by elements when they accept or activate a new step
event for <em class="parameter"><code>amount</code></em>
 in <em class="parameter"><code>format</code></em>
.</p>
<p><em class="parameter"><code>active</code></em>
 is set to <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> when the element accepted the new step event and has
queued it for execution in the streaming threads.</p>
<p><em class="parameter"><code>active</code></em>
 is set to <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> when the element has activated the step operation and
is now ready to start executing the step in the streaming thread. After this
message is emitted, the application can queue a new step operation in the
element.</p>
<div class="refsect3">
<a name="gst-message-new-step-start.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>active</p></td>
<td class="parameter_description"><p>if the step is active or queued</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>the format of <em class="parameter"><code>amount</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>amount</p></td>
<td class="parameter_description"><p>the amount of stepped data</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>rate</p></td>
<td class="parameter_description"><p>the rate of the stepped amount</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>flush</p></td>
<td class="parameter_description"><p>is this an flushing step</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>intermediate</p></td>
<td class="parameter_description"><p>is this an intermediate step</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-step-start.returns"></a><h4>Returns</h4>
<p>The new step_start message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-step-start"></a><h3>gst_message_parse_step_start ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_step_start (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *active</code></em>,
                              <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> *format</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> *amount</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *rate</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *flush</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *intermediate</code></em>);</pre>
<p>Extract the values from step_start message.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-step-start.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_STEP_DONE.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>active</p></td>
<td class="parameter_description"><p>result location for the active flag. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>result location for the format. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>amount</p></td>
<td class="parameter_description"><p>result location for the amount. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>rate</p></td>
<td class="parameter_description"><p>result location for the rate. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>flush</p></td>
<td class="parameter_description"><p>result location for the flush flag. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>intermediate</p></td>
<td class="parameter_description"><p>result location for the intermediate flag. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-qos"></a><h3>gst_message_new_qos ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_qos (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                     <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> live</code></em>,
                     <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> running_time</code></em>,
                     <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> stream_time</code></em>,
                     <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> timestamp</code></em>,
                     <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> duration</code></em>);</pre>
<p>A QOS message is posted on the bus whenever an element decides to drop a
buffer because of QoS reasons or whenever it changes its processing strategy
because of QoS reasons (quality adjustments such as processing at lower
accuracy).</p>
<p>This message can be posted by an element that performs synchronisation against the
clock (live) or it could be dropped by an element that performs QoS because of QOS
events received from a downstream element (!live).</p>
<p><em class="parameter"><code>running_time</code></em>
, <em class="parameter"><code>stream_time</code></em>
, <em class="parameter"><code>timestamp</code></em>
, <em class="parameter"><code>duration</code></em>
 should be set to the
respective running-time, stream-time, timestamp and duration of the (dropped)
buffer that generated the QoS event. Values can be left to
GST_CLOCK_TIME_NONE when unknown.</p>
<div class="refsect3">
<a name="gst-message-new-qos.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>live</p></td>
<td class="parameter_description"><p>if the message was generated by a live element</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>running_time</p></td>
<td class="parameter_description"><p>the running time of the buffer that generated the message</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>stream_time</p></td>
<td class="parameter_description"><p>the stream time of the buffer that generated the message</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>timestamp</p></td>
<td class="parameter_description"><p>the timestamps of the buffer that generated the message</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>duration</p></td>
<td class="parameter_description"><p>the duration of the buffer that generated the message</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-qos.returns"></a><h4>Returns</h4>
<p>The new qos message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-set-qos-values"></a><h3>gst_message_set_qos_values ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_set_qos_values (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> jitter</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> proportion</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> quality</code></em>);</pre>
<p>Set the QoS values that have been calculated/analysed from the QoS data</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-set-qos-values.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_QOS.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>jitter</p></td>
<td class="parameter_description"><p>The difference of the running-time against the deadline.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>proportion</p></td>
<td class="parameter_description"><p>Long term prediction of the ideal rate relative to normal rate
to get optimal quality.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>quality</p></td>
<td class="parameter_description"><p>An element dependent integer value that specifies the current
quality level of the element. The default maximum quality is 1000000.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-set-qos-stats"></a><h3>gst_message_set_qos_stats ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_set_qos_stats (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                           <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> format</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> processed</code></em>,
                           <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> dropped</code></em>);</pre>
<p>Set the QoS stats representing the history of the current continuous pipeline
playback period.</p>
<p>When <em class="parameter"><code>format</code></em>
 is <em class="parameter"><code>GST_FORMAT_UNDEFINED</code></em>
 both <em class="parameter"><code>dropped</code></em>
 and <em class="parameter"><code>processed</code></em>
 are
invalid. Values of -1 for either <em class="parameter"><code>processed</code></em>
 or <em class="parameter"><code>dropped</code></em>
 mean unknown values.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-set-qos-stats.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_QOS.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>Units of the 'processed' and 'dropped' fields. Video sinks and video
filters will use GST_FORMAT_BUFFERS (frames). Audio sinks and audio filters
will likely use GST_FORMAT_DEFAULT (samples).</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>processed</p></td>
<td class="parameter_description"><p>Total number of units correctly processed since the last state
change to READY or a flushing operation.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>dropped</p></td>
<td class="parameter_description"><p>Total number of units dropped since the last state change to READY
or a flushing operation.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-qos"></a><h3>gst_message_parse_qos ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_qos (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *live</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> *running_time</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> *stream_time</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> *timestamp</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> *duration</code></em>);</pre>
<p>Extract the timestamps and live status from the QoS message.</p>
<p>The returned values give the running_time, stream_time, timestamp and
duration of the dropped buffer. Values of GST_CLOCK_TIME_NONE mean unknown
values.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-qos.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_QOS.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>live</p></td>
<td class="parameter_description"><p>if the message was generated by a live element. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>running_time</p></td>
<td class="parameter_description"><p>the running time of the buffer that
generated the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>stream_time</p></td>
<td class="parameter_description"><p>the stream time of the buffer that
generated the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>timestamp</p></td>
<td class="parameter_description"><p>the timestamps of the buffer that
generated the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>duration</p></td>
<td class="parameter_description"><p>the duration of the buffer that
generated the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-qos-values"></a><h3>gst_message_parse_qos_values ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_qos_values (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint64"><span class="type">gint64</span></a> *jitter</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gdouble"><span class="type">gdouble</span></a> *proportion</code></em>,
                              <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> *quality</code></em>);</pre>
<p>Extract the QoS values that have been calculated/analysed from the QoS data</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-qos-values.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_QOS.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>jitter</p></td>
<td class="parameter_description"><p>The difference of the running-time against
the deadline. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>proportion</p></td>
<td class="parameter_description"><p>Long term prediction of the ideal rate
relative to normal rate to get optimal quality. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>quality</p></td>
<td class="parameter_description"><p>An element dependent integer value that
specifies the current quality level of the element. The default
maximum quality is 1000000. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-qos-stats"></a><h3>gst_message_parse_qos_stats ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_qos_stats (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                             <em class="parameter"><code><a class="link" href="gstreamer-GstFormat.html#GstFormat" title="enum GstFormat"><span class="type">GstFormat</span></a> *format</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> *processed</code></em>,
                             <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> *dropped</code></em>);</pre>
<p>Extract the QoS stats representing the history of the current continuous
pipeline playback period.</p>
<p>When <em class="parameter"><code>format</code></em>
 is <em class="parameter"><code>GST_FORMAT_UNDEFINED</code></em>
 both <em class="parameter"><code>dropped</code></em>
 and <em class="parameter"><code>processed</code></em>
 are
invalid. Values of -1 for either <em class="parameter"><code>processed</code></em>
 or <em class="parameter"><code>dropped</code></em>
 mean unknown values.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-qos-stats.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_QOS.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>format</p></td>
<td class="parameter_description"><p>Units of the 'processed' and 'dropped' fields.
Video sinks and video filters will use GST_FORMAT_BUFFERS (frames).
Audio sinks and audio filters will likely use GST_FORMAT_DEFAULT
(samples). </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>processed</p></td>
<td class="parameter_description"><p>Total number of units correctly processed
since the last state change to READY or a flushing operation. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>dropped</p></td>
<td class="parameter_description"><p>Total number of units dropped since the last
state change to READY or a flushing operation. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-toc"></a><h3>gst_message_new_toc ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_toc (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                     <em class="parameter"><code><a class="link" href="GstToc.html" title="GstToc"><span class="type">GstToc</span></a> *toc</code></em>,
                     <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> updated</code></em>);</pre>
<p>Create a new TOC message. The message is posted by elements
that discovered or updated a TOC.</p>
<div class="refsect3">
<a name="gst-message-new-toc.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>the object originating the message.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>toc</p></td>
<td class="parameter_description"><p><a class="link" href="GstToc.html" title="GstToc"><span class="type">GstToc</span></a> structure for the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>updated</p></td>
<td class="parameter_description"><p>whether TOC was updated or not.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-toc.returns"></a><h4>Returns</h4>
<p>a new TOC message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-toc"></a><h3>gst_message_parse_toc ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_toc (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                       <em class="parameter"><code><a class="link" href="GstToc.html" title="GstToc"><span class="type">GstToc</span></a> **toc</code></em>,
                       <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *updated</code></em>);</pre>
<p>Extract the TOC from the <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>. The TOC returned in the
output argument is a copy; the caller must free it with
<a class="link" href="GstToc.html#gst-toc-unref" title="gst_toc_unref()"><code class="function">gst_toc_unref()</code></a> when done.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-toc.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_TOC.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>toc</p></td>
<td class="parameter_description"><p>return location for the TOC. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>updated</p></td>
<td class="parameter_description"><p>return location for the updated flag. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-reset-time"></a><h3>gst_message_new_reset_time ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_reset_time (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                            <em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> running_time</code></em>);</pre>
<p>This message is posted when the pipeline running-time should be reset to
<em class="parameter"><code>running_time</code></em>
, like after a flushing seek.</p>
<div class="refsect3">
<a name="gst-message-new-reset-time.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>running_time</p></td>
<td class="parameter_description"><p>the requested running-time</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-reset-time.returns"></a><h4>Returns</h4>
<p>The new reset_time message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-reset-time"></a><h3>gst_message_parse_reset_time ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_reset_time (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                              <em class="parameter"><code><a class="link" href="GstClock.html#GstClockTime" title="GstClockTime"><span class="type">GstClockTime</span></a> *running_time</code></em>);</pre>
<p>Extract the running-time from the RESET_TIME message.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-reset-time.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_RESET_TIME.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>running_time</p></td>
<td class="parameter_description"><p>Result location for the running_time or
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-stream-start"></a><h3>gst_message_new_stream_start ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_stream_start (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>);</pre>
<p>Create a new stream_start message. This message is generated and posted in
the sink elements of a GstBin. The bin will only forward the STREAM_START
message to the application if all sinks have posted an STREAM_START message.</p>
<div class="refsect3">
<a name="gst-message-new-stream-start.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-stream-start.returns"></a><h4>Returns</h4>
<p>The new stream_start message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-set-group-id"></a><h3>gst_message_set_group_id ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_set_group_id (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                          <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> group_id</code></em>);</pre>
<p>Sets the group id on the stream-start message.</p>
<p>All streams that have the same group id are supposed to be played
together, i.e. all streams inside a container file should have the
same group id but different stream ids. The group id should change
each time the stream is started, resulting in different group ids
each time a file is played for example.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-set-group-id.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>the message</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>group_id</p></td>
<td class="parameter_description"><p>the group id</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix10.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-group-id"></a><h3>gst_message_parse_group_id ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_message_parse_group_id (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *group_id</code></em>);</pre>
<p>Extract the group from the STREAM_START message.</p>
<div class="refsect3">
<a name="gst-message-parse-group-id.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_STREAM_START.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>group_id</p></td>
<td class="parameter_description"><p>Result location for the group id or
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-parse-group-id.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the message had a group id set, <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</p>
<p>MT safe.</p>
</div>
<p class="since">Since: <a class="link" href="ix10.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-stream-collection"></a><h3>gst_message_new_stream_collection ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_stream_collection (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                                   <em class="parameter"><code><a class="link" href="gstreamer-GstStreamCollection.html#GstStreamCollection" title="struct GstStreamCollection"><span class="type">GstStreamCollection</span></a> *collection</code></em>);</pre>
<p>Creates a new stream-collection message. The message is used to announce new
<a class="link" href="gstreamer-GstStreamCollection.html#GstStreamCollection" title="struct GstStreamCollection"><span class="type">GstStreamCollection</span></a></p>
<div class="refsect3">
<a name="gst-message-new-stream-collection.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> that created the message</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>collection</p></td>
<td class="parameter_description"><p>The <a class="link" href="gstreamer-GstStreamCollection.html#GstStreamCollection" title="struct GstStreamCollection"><span class="type">GstStreamCollection</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-stream-collection.returns"></a><h4>Returns</h4>
<p> a newly allocated <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-stream-collection"></a><h3>gst_message_parse_stream_collection ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_stream_collection (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                     <em class="parameter"><code><a class="link" href="gstreamer-GstStreamCollection.html#GstStreamCollection" title="struct GstStreamCollection"><span class="type">GstStreamCollection</span></a> **collection</code></em>);</pre>
<p>Parses a stream-collection message.</p>
<div class="refsect3">
<a name="gst-message-parse-stream-collection.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type <a class="link" href="GstMessage.html#GST-MESSAGE-STREAM-COLLECTION:CAPS"><code class="literal">GST_MESSAGE_STREAM_COLLECTION</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>collection</p></td>
<td class="parameter_description"><p>A location where to store a
pointer to the <a class="link" href="gstreamer-GstStreamCollection.html#GstStreamCollection" title="struct GstStreamCollection"><span class="type">GstStreamCollection</span></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-structure-change"></a><h3>gst_message_new_structure_change ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_structure_change (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                                  <em class="parameter"><code><a class="link" href="GstMessage.html#GstStructureChangeType" title="enum GstStructureChangeType"><span class="type">GstStructureChangeType</span></a> type</code></em>,
                                  <em class="parameter"><code><a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> *owner</code></em>,
                                  <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> busy</code></em>);</pre>
<p>Create a new structure change message. This message is posted when the
structure of a pipeline is in the process of being changed, for example
when pads are linked or unlinked.</p>
<p><em class="parameter"><code>src</code></em>
 should be the sinkpad that unlinked or linked.</p>
<div class="refsect3">
<a name="gst-message-new-structure-change.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>The change type.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>owner</p></td>
<td class="parameter_description"><p>The owner element of <em class="parameter"><code>src</code></em>
. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>busy</p></td>
<td class="parameter_description"><p>Whether the structure change is busy.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-structure-change.returns"></a><h4>Returns</h4>
<p>the new structure change message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-structure-change"></a><h3>gst_message_parse_structure_change ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_structure_change (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                    <em class="parameter"><code><a class="link" href="GstMessage.html#GstStructureChangeType" title="enum GstStructureChangeType"><span class="type">GstStructureChangeType</span></a> *type</code></em>,
                                    <em class="parameter"><code><a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> **owner</code></em>,
                                    <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *busy</code></em>);</pre>
<p>Extracts the change type and completion status from the GstMessage.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-structure-change.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_STRUCTURE_CHANGE.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>A pointer to hold the change type. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>owner</p></td>
<td class="parameter_description"><p>The owner element of the
message source. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>busy</p></td>
<td class="parameter_description"><p>a pointer to hold whether the change is in
progress or has been completed. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-request-state"></a><h3>gst_message_new_request_state ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_request_state (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                               <em class="parameter"><code><a class="link" href="GstElement.html#GstState" title="enum GstState"><span class="type">GstState</span></a> state</code></em>);</pre>
<p>This message can be posted by elements when they want to have their state
changed. A typical use case would be an audio server that wants to pause the
pipeline because a higher priority stream is being played.</p>
<div class="refsect3">
<a name="gst-message-new-request-state.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>state</p></td>
<td class="parameter_description"><p>The new requested state</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-request-state.returns"></a><h4>Returns</h4>
<p>the new request state message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-request-state"></a><h3>gst_message_parse_request_state ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_request_state (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstElement.html#GstState" title="enum GstState"><span class="type">GstState</span></a> *state</code></em>);</pre>
<p>Extract the requested state from the request_state message.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-request-state.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_REQUEST_STATE.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>state</p></td>
<td class="parameter_description"><p>Result location for the requested state or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-stream-status"></a><h3>gst_message_new_stream_status ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_stream_status (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                               <em class="parameter"><code><a class="link" href="GstMessage.html#GstStreamStatusType" title="enum GstStreamStatusType"><span class="type">GstStreamStatusType</span></a> type</code></em>,
                               <em class="parameter"><code><a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> *owner</code></em>);</pre>
<p>Create a new stream status message. This message is posted when a streaming
thread is created/destroyed or when the state changed.</p>
<div class="refsect3">
<a name="gst-message-new-stream-status.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>The stream status type.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>owner</p></td>
<td class="parameter_description"><p>the owner element of <em class="parameter"><code>src</code></em>
. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-stream-status.returns"></a><h4>Returns</h4>
<p>the new stream status message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-stream-status"></a><h3>gst_message_parse_stream_status ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_stream_status (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstMessage.html#GstStreamStatusType" title="enum GstStreamStatusType"><span class="type">GstStreamStatusType</span></a> *type</code></em>,
                                 <em class="parameter"><code><a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a> **owner</code></em>);</pre>
<p>Extracts the stream status type and owner the GstMessage. The returned
owner remains valid for as long as the reference to <em class="parameter"><code>message</code></em>
 is valid and
should thus not be unreffed.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-stream-status.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_STREAM_STATUS.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>A pointer to hold the status type. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>owner</p></td>
<td class="parameter_description"><p>The owner element of the message source. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-set-stream-status-object"></a><h3>gst_message_set_stream_status_object ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_set_stream_status_object (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                      <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> *object</code></em>);</pre>
<p>Configures the object handling the streaming thread. This is usually a
GstTask object but other objects might be added in the future.</p>
<div class="refsect3">
<a name="gst-message-set-stream-status-object.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_STREAM_STATUS.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>object</p></td>
<td class="parameter_description"><p>the object controlling the streaming</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-get-stream-status-object"></a><h3>gst_message_get_stream_status_object ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="returnvalue">GValue</span></a> *
gst_message_get_stream_status_object (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>);</pre>
<p>Extracts the object managing the streaming thread from <em class="parameter"><code>message</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-get-stream-status-object.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_STREAM_STATUS.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-get-stream-status-object.returns"></a><h4>Returns</h4>
<p>a GValue containing the object that manages the
streaming thread. This object is usually of type GstTask but other types can
be added in the future. The object remains valid as long as <em class="parameter"><code>message</code></em>
is
valid. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-progress"></a><h3>gst_message_new_progress ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_progress (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                          <em class="parameter"><code><a class="link" href="GstMessage.html#GstProgressType" title="enum GstProgressType"><span class="type">GstProgressType</span></a> type</code></em>,
                          <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *code</code></em>,
                          <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *text</code></em>);</pre>
<p>Progress messages are posted by elements when they use an asynchronous task
to perform actions triggered by a state change.</p>
<p><em class="parameter"><code>code</code></em>
 contains a well defined string describing the action.
<em class="parameter"><code>text</code></em>
 should contain a user visible string detailing the current action.</p>
<div class="refsect3">
<a name="gst-message-new-progress.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html#GstProgressType" title="enum GstProgressType"><span class="type">GstProgressType</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>code</p></td>
<td class="parameter_description"><p>a progress code</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>text</p></td>
<td class="parameter_description"><p>free, user visible text describing the progress</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-progress.returns"></a><h4>Returns</h4>
<p>The new qos message. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-progress"></a><h3>gst_message_parse_progress ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_progress (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                            <em class="parameter"><code><a class="link" href="GstMessage.html#GstProgressType" title="enum GstProgressType"><span class="type">GstProgressType</span></a> *type</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **code</code></em>,
                            <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **text</code></em>);</pre>
<p>Parses the progress <em class="parameter"><code>type</code></em>
, <em class="parameter"><code>code</code></em>
 and <em class="parameter"><code>text</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-parse-progress.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_PROGRESS.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>type</p></td>
<td class="parameter_description"><p>location for the type. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>code</p></td>
<td class="parameter_description"><p>location for the code. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>text</p></td>
<td class="parameter_description"><p>location for the text. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-need-context"></a><h3>gst_message_new_need_context ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_need_context (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                              <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *context_type</code></em>);</pre>
<p>This message is posted when an element needs a specific <a class="link" href="GstContext.html" title="GstContext"><span class="type">GstContext</span></a>.</p>
<div class="refsect3">
<a name="gst-message-new-need-context.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>context_type</p></td>
<td class="parameter_description"><p>The context type that is needed</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-need-context.returns"></a><h4>Returns</h4>
<p>The new need-context message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix10.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-context-type"></a><h3>gst_message_parse_context_type ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_message_parse_context_type (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **context_type</code></em>);</pre>
<p>Parse a context type from an existing GST_MESSAGE_NEED_CONTEXT message.</p>
<div class="refsect3">
<a name="gst-message-parse-context-type.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a GST_MESSAGE_NEED_CONTEXT type message</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>context_type</p></td>
<td class="parameter_description"><p>the context type, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-parse-context-type.returns"></a><h4>Returns</h4>
<p> a <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> indicating if the parsing succeeded.</p>
</div>
<p class="since">Since: <a class="link" href="ix10.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-have-context"></a><h3>gst_message_new_have_context ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_have_context (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                              <em class="parameter"><code><a class="link" href="GstContext.html" title="GstContext"><span class="type">GstContext</span></a> *context</code></em>);</pre>
<p>This message is posted when an element has a new local <a class="link" href="GstContext.html" title="GstContext"><span class="type">GstContext</span></a>.</p>
<div class="refsect3">
<a name="gst-message-new-have-context.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The object originating the message. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>the context. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-have-context.returns"></a><h4>Returns</h4>
<p>The new have-context message.</p>
<p>MT safe. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix10.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-have-context"></a><h3>gst_message_parse_have_context ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_have_context (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                <em class="parameter"><code><a class="link" href="GstContext.html" title="GstContext"><span class="type">GstContext</span></a> **context</code></em>);</pre>
<p>Extract the context from the HAVE_CONTEXT message.</p>
<p>MT safe.</p>
<div class="refsect3">
<a name="gst-message-parse-have-context.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>A valid <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type GST_MESSAGE_HAVE_CONTEXT.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>context</p></td>
<td class="parameter_description"><p>Result location for the
context or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix10.html#api-index-1.2">1.2</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-device-added"></a><h3>gst_message_new_device_added ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_device_added (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                              <em class="parameter"><code><a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a> *device</code></em>);</pre>
<p>Creates a new device-added message. The device-added message is produced by
<a class="link" href="gstreamer-GstDeviceProvider.html#GstDeviceProvider" title="struct GstDeviceProvider"><span class="type">GstDeviceProvider</span></a> or a <a class="link" href="gstreamer-GstDeviceMonitor.html#GstDeviceMonitor" title="struct GstDeviceMonitor"><span class="type">GstDeviceMonitor</span></a>. They announce the appearance
of monitored devices.</p>
<div class="refsect3">
<a name="gst-message-new-device-added.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> that created the message</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>device</p></td>
<td class="parameter_description"><p>The new <a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-device-added.returns"></a><h4>Returns</h4>
<p> a newly allocated <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p>
</div>
<p class="since">Since: <a class="link" href="ix08.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-device-removed"></a><h3>gst_message_new_device_removed ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_device_removed (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                                <em class="parameter"><code><a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a> *device</code></em>);</pre>
<p>Creates a new device-removed message. The device-removed message is produced
by <a class="link" href="gstreamer-GstDeviceProvider.html#GstDeviceProvider" title="struct GstDeviceProvider"><span class="type">GstDeviceProvider</span></a> or a <a class="link" href="gstreamer-GstDeviceMonitor.html#GstDeviceMonitor" title="struct GstDeviceMonitor"><span class="type">GstDeviceMonitor</span></a>. They announce the
disappearance of monitored devices.</p>
<div class="refsect3">
<a name="gst-message-new-device-removed.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> that created the message</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>device</p></td>
<td class="parameter_description"><p>The removed <a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-device-removed.returns"></a><h4>Returns</h4>
<p> a newly allocated <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p>
</div>
<p class="since">Since: <a class="link" href="ix08.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-device-changed"></a><h3>gst_message_new_device_changed ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_device_changed (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                                <em class="parameter"><code><a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a> *device</code></em>,
                                <em class="parameter"><code><a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a> *changed_device</code></em>);</pre>
<p>Creates a new device-changed message. The device-changed message is produced
by <a class="link" href="gstreamer-GstDeviceProvider.html#GstDeviceProvider" title="struct GstDeviceProvider"><span class="type">GstDeviceProvider</span></a> or a <a class="link" href="gstreamer-GstDeviceMonitor.html#GstDeviceMonitor" title="struct GstDeviceMonitor"><span class="type">GstDeviceMonitor</span></a>. They announce that a device
properties has changed and <em class="parameter"><code>device</code></em>
 represent the new modified version of <em class="parameter"><code>changed_device</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-new-device-changed.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> that created the message</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>device</p></td>
<td class="parameter_description"><p>The newly created device representing <em class="parameter"><code>replaced_device</code></em>
with its new configuration. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-device-changed.returns"></a><h4>Returns</h4>
<p> a newly allocated <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p>
</div>
<p class="since">Since: 1.16</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-device-added"></a><h3>gst_message_parse_device_added ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_device_added (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                <em class="parameter"><code><a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a> **device</code></em>);</pre>
<p>Parses a device-added message. The device-added message is produced by
<a class="link" href="gstreamer-GstDeviceProvider.html#GstDeviceProvider" title="struct GstDeviceProvider"><span class="type">GstDeviceProvider</span></a> or a <a class="link" href="gstreamer-GstDeviceMonitor.html#GstDeviceMonitor" title="struct GstDeviceMonitor"><span class="type">GstDeviceMonitor</span></a>. It announces the appearance
of monitored devices.</p>
<div class="refsect3">
<a name="gst-message-parse-device-added.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type <a class="link" href="GstMessage.html#GST-MESSAGE-DEVICE-ADDED:CAPS"><code class="literal">GST_MESSAGE_DEVICE_ADDED</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>device</p></td>
<td class="parameter_description"><p>A location where to store a
pointer to the new <a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix08.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-device-removed"></a><h3>gst_message_parse_device_removed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_device_removed (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                  <em class="parameter"><code><a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a> **device</code></em>);</pre>
<p>Parses a device-removed message. The device-removed message is produced by
<a class="link" href="gstreamer-GstDeviceProvider.html#GstDeviceProvider" title="struct GstDeviceProvider"><span class="type">GstDeviceProvider</span></a> or a <a class="link" href="gstreamer-GstDeviceMonitor.html#GstDeviceMonitor" title="struct GstDeviceMonitor"><span class="type">GstDeviceMonitor</span></a>. It announces the
disappearance of monitored devices.</p>
<div class="refsect3">
<a name="gst-message-parse-device-removed.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type <a class="link" href="GstMessage.html#GST-MESSAGE-DEVICE-REMOVED:CAPS"><code class="literal">GST_MESSAGE_DEVICE_REMOVED</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>device</p></td>
<td class="parameter_description"><p>A location where to store a
pointer to the removed <a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix08.html#api-index-1.4">1.4</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-device-changed"></a><h3>gst_message_parse_device_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_device_changed (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                  <em class="parameter"><code><a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a> **device</code></em>,
                                  <em class="parameter"><code><a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a> **changed_device</code></em>);</pre>
<p>Parses a device-changed message. The device-changed message is produced by
<a class="link" href="gstreamer-GstDeviceProvider.html#GstDeviceProvider" title="struct GstDeviceProvider"><span class="type">GstDeviceProvider</span></a> or a <a class="link" href="gstreamer-GstDeviceMonitor.html#GstDeviceMonitor" title="struct GstDeviceMonitor"><span class="type">GstDeviceMonitor</span></a>. It announces the
disappearance of monitored devices. * It announce that a device properties has
changed and <em class="parameter"><code>device</code></em>
 represents the new modified version of <em class="parameter"><code>changed_device</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-parse-device-changed.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type <a class="link" href="GstMessage.html#GST-MESSAGE-DEVICE-CHANGED:CAPS"><code class="literal">GST_MESSAGE_DEVICE_CHANGED</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>device</p></td>
<td class="parameter_description"><p>A location where to store a
pointer to the updated version of the <a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>changed_device</p></td>
<td class="parameter_description"><p>A location where to store a
pointer to the old version of the <a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 1.16</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-property-notify"></a><h3>gst_message_new_property_notify ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_property_notify (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                                 <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *property_name</code></em>,
                                 <em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> *val</code></em>);</pre>
<div class="refsect3">
<a name="gst-message-new-property-notify.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> whose property changed (may or may not be a <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a>)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>property_name</p></td>
<td class="parameter_description"><p>name of the property that changed</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>val</p></td>
<td class="parameter_description"><p>new property value, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-property-notify.returns"></a><h4>Returns</h4>
<p> a newly allocated <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-property-notify"></a><h3>gst_message_parse_property_notify ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_property_notify (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                   <em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> **object</code></em>,
                                   <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **property_name</code></em>,
                                   <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gobject/gobject-Generic-values.html#GValue-struct"><span class="type">GValue</span></a> **property_value</code></em>);</pre>
<p>Parses a property-notify message. These will be posted on the bus only
when set up with <a class="link" href="GstElement.html#gst-element-add-property-notify-watch" title="gst_element_add_property_notify_watch ()"><code class="function">gst_element_add_property_notify_watch()</code></a> or
<a class="link" href="GstElement.html#gst-element-add-property-deep-notify-watch" title="gst_element_add_property_deep_notify_watch ()"><code class="function">gst_element_add_property_deep_notify_watch()</code></a>.</p>
<div class="refsect3">
<a name="gst-message-parse-property-notify.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type <a class="link" href="GstMessage.html#GST-MESSAGE-PROPERTY-NOTIFY:CAPS"><code class="literal">GST_MESSAGE_PROPERTY_NOTIFY</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>object</p></td>
<td class="parameter_description"><p>location where to store a
pointer to the object whose property got changed, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>property_name</p></td>
<td class="parameter_description"><p>return location for
the name of the property that got changed, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>property_value</p></td>
<td class="parameter_description"><p>return location for
the new value of the property that got changed, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. This will
only be set if the property notify watch was told to include the value
when it was set up. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-streams-selected"></a><h3>gst_message_new_streams_selected ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_streams_selected (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                                  <em class="parameter"><code><a class="link" href="gstreamer-GstStreamCollection.html#GstStreamCollection" title="struct GstStreamCollection"><span class="type">GstStreamCollection</span></a> *collection</code></em>);</pre>
<p>Creates a new steams-selected message. The message is used to announce
that an array of streams has been selected. This is generally in response
to a <a class="link" href="GstEvent.html#GST-EVENT-SELECT-STREAMS:CAPS"><span class="type">GST_EVENT_SELECT_STREAMS</span></a> event, or when an element (such as decodebin3)
makes an initial selection of streams.</p>
<p>The message also contains the <a class="link" href="gstreamer-GstStreamCollection.html#GstStreamCollection" title="struct GstStreamCollection"><span class="type">GstStreamCollection</span></a> to which the various streams
belong to.</p>
<p>Users of <a class="link" href="GstMessage.html#gst-message-new-streams-selected" title="gst_message_new_streams_selected ()"><code class="function">gst_message_new_streams_selected()</code></a> can add the selected streams with
<a class="link" href="GstMessage.html#gst-message-streams-selected-add" title="gst_message_streams_selected_add ()"><code class="function">gst_message_streams_selected_add()</code></a>.</p>
<div class="refsect3">
<a name="gst-message-new-streams-selected.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> that created the message</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>collection</p></td>
<td class="parameter_description"><p>The <a class="link" href="gstreamer-GstStreamCollection.html#GstStreamCollection" title="struct GstStreamCollection"><span class="type">GstStreamCollection</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-streams-selected.returns"></a><h4>Returns</h4>
<p> a newly allocated <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-streams-selected"></a><h3>gst_message_parse_streams_selected ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_streams_selected (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                    <em class="parameter"><code><a class="link" href="gstreamer-GstStreamCollection.html#GstStreamCollection" title="struct GstStreamCollection"><span class="type">GstStreamCollection</span></a> **collection</code></em>);</pre>
<p>Parses a streams-selected message.</p>
<div class="refsect3">
<a name="gst-message-parse-streams-selected.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type <a class="link" href="GstMessage.html#GST-MESSAGE-STREAMS-SELECTED:CAPS"><code class="literal">GST_MESSAGE_STREAMS_SELECTED</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>collection</p></td>
<td class="parameter_description"><p>A location where to store a
pointer to the <a class="link" href="gstreamer-GstStreamCollection.html#GstStreamCollection" title="struct GstStreamCollection"><span class="type">GstStreamCollection</span></a>, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-streams-selected-add"></a><h3>gst_message_streams_selected_add ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_streams_selected_add (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                  <em class="parameter"><code><a class="link" href="gstreamer-GstStream.html#GstStream" title="struct GstStream"><span class="type">GstStream</span></a> *stream</code></em>);</pre>
<p>Adds the <em class="parameter"><code>stream</code></em>
 to the <em class="parameter"><code>message</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-streams-selected-add.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type <a class="link" href="GstMessage.html#GST-MESSAGE-STREAMS-SELECTED:CAPS"><code class="literal">GST_MESSAGE_STREAMS_SELECTED</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>stream</p></td>
<td class="parameter_description"><p>a <a class="link" href="gstreamer-GstStream.html#GstStream" title="struct GstStream"><span class="type">GstStream</span></a> to add to <em class="parameter"><code>message</code></em>
. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-streams-selected-get-size"></a><h3>gst_message_streams_selected_get_size ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>
gst_message_streams_selected_get_size (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>);</pre>
<p>Returns the number of streams contained in the <em class="parameter"><code>message</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-streams-selected-get-size.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type <a class="link" href="GstMessage.html#GST-MESSAGE-STREAMS-SELECTED:CAPS"><code class="literal">GST_MESSAGE_STREAMS_SELECTED</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-streams-selected-get-size.returns"></a><h4>Returns</h4>
<p> The number of streams contained within.</p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-streams-selected-get-stream"></a><h3>gst_message_streams_selected_get_stream ()</h3>
<pre class="programlisting"><a class="link" href="gstreamer-GstStream.html#GstStream" title="struct GstStream"><span class="returnvalue">GstStream</span></a> *
gst_message_streams_selected_get_stream
                               (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> idx</code></em>);</pre>
<p>Retrieves the <a class="link" href="gstreamer-GstStream.html#GstStream" title="struct GstStream"><span class="type">GstStream</span></a> with index <em class="parameter"><code>index</code></em>
 from the <em class="parameter"><code>message</code></em>
.</p>
<div class="refsect3">
<a name="gst-message-streams-selected-get-stream.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type <a class="link" href="GstMessage.html#GST-MESSAGE-STREAMS-SELECTED:CAPS"><code class="literal">GST_MESSAGE_STREAMS_SELECTED</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>idx</p></td>
<td class="parameter_description"><p>Index of the stream to retrieve</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-streams-selected-get-stream.returns"></a><h4>Returns</h4>
<p>A <a class="link" href="gstreamer-GstStream.html#GstStream" title="struct GstStream"><span class="type">GstStream</span></a>. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-new-redirect"></a><h3>gst_message_new_redirect ()</h3>
<pre class="programlisting"><a class="link" href="GstMessage.html" title="GstMessage"><span class="returnvalue">GstMessage</span></a> *
gst_message_new_redirect (<em class="parameter"><code><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *src</code></em>,
                          <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *location</code></em>,
                          <em class="parameter"><code><a class="link" href="GstTagList.html" title="GstTagList"><span class="type">GstTagList</span></a> *tag_list</code></em>,
                          <em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *entry_struct</code></em>);</pre>
<p>Creates a new redirect message and adds a new entry to it. Redirect messages
are posted when an element detects that the actual data has to be retrieved
from a different location. This is useful if such a redirection cannot be
handled inside a source element, for example when HTTP 302/303 redirects
return a non-HTTP URL.</p>
<p>The redirect message can hold multiple entries. The first one is added
when the redirect message is created, with the given location, tag_list,
entry_struct arguments. Use <a class="link" href="GstMessage.html#gst-message-add-redirect-entry" title="gst_message_add_redirect_entry ()"><code class="function">gst_message_add_redirect_entry()</code></a> to add more
entries.</p>
<p>Each entry has a location, a tag list, and a structure. All of these are
optional. The tag list and structure are useful for additional metadata,
such as bitrate statistics for the given location.</p>
<p>By default, message recipients should treat entries in the order they are
stored. The recipient should therefore try entry #0 first, and if this
entry is not acceptable or working, try entry #1 etc. Senders must make
sure that they add entries in this order. However, recipients are free to
ignore the order and pick an entry that is "best" for them. One example
would be a recipient that scans the entries for the one with the highest
bitrate tag.</p>
<p>The specified location string is copied. However, ownership over the tag
list and structure are transferred to the message.</p>
<div class="refsect3">
<a name="gst-message-new-redirect.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>src</p></td>
<td class="parameter_description"><p>The <a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> whose property changed (may or may not be a <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a>)</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>location</p></td>
<td class="parameter_description"><p>location string for the new entry. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>tag_list</p></td>
<td class="parameter_description"><p>tag list for the new entry. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>entry_struct</p></td>
<td class="parameter_description"><p>structure for the new entry. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-new-redirect.returns"></a><h4>Returns</h4>
<p> a newly allocated <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a></p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-add-redirect-entry"></a><h3>gst_message_add_redirect_entry ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_add_redirect_entry (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *location</code></em>,
                                <em class="parameter"><code><a class="link" href="GstTagList.html" title="GstTagList"><span class="type">GstTagList</span></a> *tag_list</code></em>,
                                <em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> *entry_struct</code></em>);</pre>
<p>Creates and appends a new entry.</p>
<p>The specified location string is copied. However, ownership over the tag
list and structure are transferred to the message.</p>
<div class="refsect3">
<a name="gst-message-add-redirect-entry.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type <a class="link" href="GstMessage.html#GST-MESSAGE-REDIRECT:CAPS"><code class="literal">GST_MESSAGE_REDIRECT</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>location</p></td>
<td class="parameter_description"><p>location string for the new entry. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>tag_list</p></td>
<td class="parameter_description"><p>tag list for the new entry. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>entry_struct</p></td>
<td class="parameter_description"><p>structure for the new entry. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-parse-redirect-entry"></a><h3>gst_message_parse_redirect_entry ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_message_parse_redirect_entry (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>,
                                  <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="type">gsize</span></a> entry_index</code></em>,
                                  <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **location</code></em>,
                                  <em class="parameter"><code><a class="link" href="GstTagList.html" title="GstTagList"><span class="type">GstTagList</span></a> **tag_list</code></em>,
                                  <em class="parameter"><code>const <a class="link" href="GstStructure.html" title="GstStructure"><span class="type">GstStructure</span></a> **entry_struct</code></em>);</pre>
<p>Parses the location and/or structure from the entry with the given index.
The index must be between 0 and <a class="link" href="GstMessage.html#gst-message-get-num-redirect-entries" title="gst_message_get_num_redirect_entries ()"><code class="function">gst_message_get_num_redirect_entries()</code></a> - 1.
Returned pointers are valid for as long as this message exists.</p>
<div class="refsect3">
<a name="gst-message-parse-redirect-entry.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type <a class="link" href="GstMessage.html#GST-MESSAGE-REDIRECT:CAPS"><code class="literal">GST_MESSAGE_REDIRECT</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>entry_index</p></td>
<td class="parameter_description"><p>index of the entry to parse</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>location</p></td>
<td class="parameter_description"><p>return location for
the pointer to the entry's location string, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>tag_list</p></td>
<td class="parameter_description"><p>return location for
the pointer to the entry's tag list, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>entry_struct</p></td>
<td class="parameter_description"><p>return location
for the pointer to the entry's structure, or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gst-message-get-num-redirect-entries"></a><h3>gst_message_get_num_redirect_entries ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gsize"><span class="returnvalue">gsize</span></a>
gst_message_get_num_redirect_entries (<em class="parameter"><code><a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> *message</code></em>);</pre>
<div class="refsect3">
<a name="gst-message-get-num-redirect-entries.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>message</p></td>
<td class="parameter_description"><p>a <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a> of type <a class="link" href="GstMessage.html#GST-MESSAGE-REDIRECT:CAPS"><code class="literal">GST_MESSAGE_REDIRECT</code></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-message-get-num-redirect-entries.returns"></a><h4>Returns</h4>
<p> the number of entries stored in the message</p>
</div>
<p class="since">Since: <a class="link" href="ix05.html#api-index-1.10">1.10</a></p>
</div>
</div>
<div class="refsect1">
<a name="GstMessage.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstMessage-struct"></a><h3>struct GstMessage</h3>
<pre class="programlisting">struct GstMessage {
  GstMiniObject   mini_object;

  GstMessageType  type;
  guint64         timestamp;
  GstObject      *src;
  guint32         seqnum;
};
</pre>
<p>A <a class="link" href="GstMessage.html" title="GstMessage"><span class="type">GstMessage</span></a>.</p>
<div class="refsect3">
<a name="GstMessage.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><a class="link" href="gstreamer-GstMiniObject.html#GstMiniObject" title="struct GstMiniObject"><span class="type">GstMiniObject</span></a> <em class="structfield"><code><a name="GstMessage-struct.mini-object"></a>mini_object</code></em>;</p></td>
<td class="struct_member_description"><p>the parent structure</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="GstMessage.html#GstMessageType" title="enum GstMessageType"><span class="type">GstMessageType</span></a> <em class="structfield"><code><a name="GstMessage-struct.type"></a>type</code></em>;</p></td>
<td class="struct_member_description"><p>the <a class="link" href="GstMessage.html#GstMessageType" title="enum GstMessageType"><span class="type">GstMessageType</span></a> of the message</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint64"><span class="type">guint64</span></a> <em class="structfield"><code><a name="GstMessage-struct.timestamp"></a>timestamp</code></em>;</p></td>
<td class="struct_member_description"><p>the timestamp of the message</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a class="link" href="GstObject.html" title="GstObject"><span class="type">GstObject</span></a> *<em class="structfield"><code><a name="GstMessage-struct.src"></a>src</code></em>;</p></td>
<td class="struct_member_description"><p>the src of the message</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint32"><span class="type">guint32</span></a> <em class="structfield"><code><a name="GstMessage-struct.seqnum"></a>seqnum</code></em>;</p></td>
<td class="struct_member_description"><p>the sequence number of the message</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstMessageType"></a><h3>enum GstMessageType</h3>
<p>The different message types that are available.</p>
<div class="refsect3">
<a name="GstMessageType.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-UNKNOWN:CAPS"></a>GST_MESSAGE_UNKNOWN</p></td>
<td class="enum_member_description">
<p>an undefined message</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-EOS:CAPS"></a>GST_MESSAGE_EOS</p></td>
<td class="enum_member_description">
<p>end-of-stream reached in a pipeline. The application will
only receive this message in the PLAYING state and every time it sets a
pipeline to PLAYING that is in the EOS state. The application can perform a
flushing seek in the pipeline, which will undo the EOS state again.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-ERROR:CAPS"></a>GST_MESSAGE_ERROR</p></td>
<td class="enum_member_description">
<p>an error occurred. When the application receives an error
message it should stop playback of the pipeline and not assume that more
data will be played.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-WARNING:CAPS"></a>GST_MESSAGE_WARNING</p></td>
<td class="enum_member_description">
<p>a warning occurred.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-INFO:CAPS"></a>GST_MESSAGE_INFO</p></td>
<td class="enum_member_description">
<p>an info message occurred</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-TAG:CAPS"></a>GST_MESSAGE_TAG</p></td>
<td class="enum_member_description">
<p>a tag was found.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-BUFFERING:CAPS"></a>GST_MESSAGE_BUFFERING</p></td>
<td class="enum_member_description">
<p>the pipeline is buffering. When the application
receives a buffering message in the PLAYING state for a non-live pipeline it
must PAUSE the pipeline until the buffering completes, when the percentage
field in the message is 100%. For live pipelines, no action must be
performed and the buffering percentage can be used to inform the user about
the progress.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-STATE-CHANGED:CAPS"></a>GST_MESSAGE_STATE_CHANGED</p></td>
<td class="enum_member_description">
<p>a state change happened</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-STATE-DIRTY:CAPS"></a>GST_MESSAGE_STATE_DIRTY</p></td>
<td class="enum_member_description">
<p>an element changed state in a streaming thread.
This message is deprecated.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-STEP-DONE:CAPS"></a>GST_MESSAGE_STEP_DONE</p></td>
<td class="enum_member_description">
<p>a stepping operation finished.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-CLOCK-PROVIDE:CAPS"></a>GST_MESSAGE_CLOCK_PROVIDE</p></td>
<td class="enum_member_description">
<p>an element notifies its capability of providing
                            a clock. This message is used internally and
                            never forwarded to the application.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-CLOCK-LOST:CAPS"></a>GST_MESSAGE_CLOCK_LOST</p></td>
<td class="enum_member_description">
<p>The current clock as selected by the pipeline became
                         unusable. The pipeline will select a new clock on
                         the next PLAYING state change. The application
                         should set the pipeline to PAUSED and back to
                         PLAYING when this message is received.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-NEW-CLOCK:CAPS"></a>GST_MESSAGE_NEW_CLOCK</p></td>
<td class="enum_member_description">
<p>a new clock was selected in the pipeline.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-STRUCTURE-CHANGE:CAPS"></a>GST_MESSAGE_STRUCTURE_CHANGE</p></td>
<td class="enum_member_description">
<p>the structure of the pipeline changed. This
message is used internally and never forwarded to the application.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-STREAM-STATUS:CAPS"></a>GST_MESSAGE_STREAM_STATUS</p></td>
<td class="enum_member_description">
<p>status about a stream, emitted when it starts,
                            stops, errors, etc..</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-APPLICATION:CAPS"></a>GST_MESSAGE_APPLICATION</p></td>
<td class="enum_member_description">
<p>message posted by the application, possibly
                          via an application-specific element.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-ELEMENT:CAPS"></a>GST_MESSAGE_ELEMENT</p></td>
<td class="enum_member_description">
<p>element-specific message, see the specific element's
                      documentation</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-SEGMENT-START:CAPS"></a>GST_MESSAGE_SEGMENT_START</p></td>
<td class="enum_member_description">
<p>pipeline started playback of a segment. This
message is used internally and never forwarded to the application.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-SEGMENT-DONE:CAPS"></a>GST_MESSAGE_SEGMENT_DONE</p></td>
<td class="enum_member_description">
<p>pipeline completed playback of a segment. This
message is forwarded to the application after all elements that posted
<em class="parameter"><code>GST_MESSAGE_SEGMENT_START</code></em>
 posted a GST_MESSAGE_SEGMENT_DONE message.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-DURATION-CHANGED:CAPS"></a>GST_MESSAGE_DURATION_CHANGED</p></td>
<td class="enum_member_description">
<p>The duration of a pipeline changed. The
application can get the new duration with a duration query.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-LATENCY:CAPS"></a>GST_MESSAGE_LATENCY</p></td>
<td class="enum_member_description">
<p>Posted by elements when their latency changes. The
application should recalculate and distribute a new latency.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-ASYNC-START:CAPS"></a>GST_MESSAGE_ASYNC_START</p></td>
<td class="enum_member_description">
<p>Posted by elements when they start an ASYNC
<a class="link" href="GstElement.html#GstStateChange" title="enum GstStateChange"><span class="type">GstStateChange</span></a>. This message is not forwarded to the application but is used
internally.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-ASYNC-DONE:CAPS"></a>GST_MESSAGE_ASYNC_DONE</p></td>
<td class="enum_member_description">
<p>Posted by elements when they complete an ASYNC
<a class="link" href="GstElement.html#GstStateChange" title="enum GstStateChange"><span class="type">GstStateChange</span></a>. The application will only receive this message from the toplevel
pipeline.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-REQUEST-STATE:CAPS"></a>GST_MESSAGE_REQUEST_STATE</p></td>
<td class="enum_member_description">
<p>Posted by elements when they want the pipeline to
change state. This message is a suggestion to the application which can
decide to perform the state change on (part of) the pipeline.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-STEP-START:CAPS"></a>GST_MESSAGE_STEP_START</p></td>
<td class="enum_member_description">
<p>A stepping operation was started.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-QOS:CAPS"></a>GST_MESSAGE_QOS</p></td>
<td class="enum_member_description">
<p>A buffer was dropped or an element changed its processing
strategy for Quality of Service reasons.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-PROGRESS:CAPS"></a>GST_MESSAGE_PROGRESS</p></td>
<td class="enum_member_description">
<p>A progress message.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-TOC:CAPS"></a>GST_MESSAGE_TOC</p></td>
<td class="enum_member_description">
<p>A new table of contents (TOC) was found or previously found TOC
was updated.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-RESET-TIME:CAPS"></a>GST_MESSAGE_RESET_TIME</p></td>
<td class="enum_member_description">
<p>Message to request resetting the pipeline's
    running time from the pipeline. This is an internal message which
    applications will likely never receive.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-STREAM-START:CAPS"></a>GST_MESSAGE_STREAM_START</p></td>
<td class="enum_member_description">
<p>Message indicating start of a new stream. Useful
    e.g. when using playbin in gapless playback mode, to get notified when
    the next title actually starts playing (which will be some time after
    the URI for the next title has been set).</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-NEED-CONTEXT:CAPS"></a>GST_MESSAGE_NEED_CONTEXT</p></td>
<td class="enum_member_description">
<p>Message indicating that an element wants a specific context (Since: 1.2)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-HAVE-CONTEXT:CAPS"></a>GST_MESSAGE_HAVE_CONTEXT</p></td>
<td class="enum_member_description">
<p>Message indicating that an element created a context (Since: 1.2)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-EXTENDED:CAPS"></a>GST_MESSAGE_EXTENDED</p></td>
<td class="enum_member_description">
<p>Message is an extended message type (see below).
    These extended message IDs can't be used directly with mask-based API
    like <a class="link" href="GstBus.html#gst-bus-poll" title="gst_bus_poll ()"><code class="function">gst_bus_poll()</code></a> or <a class="link" href="GstBus.html#gst-bus-timed-pop-filtered" title="gst_bus_timed_pop_filtered ()"><code class="function">gst_bus_timed_pop_filtered()</code></a>, but you can still
    filter for GST_MESSAGE_EXTENDED and then check the result for the
    specific type. (Since: 1.4)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-DEVICE-ADDED:CAPS"></a>GST_MESSAGE_DEVICE_ADDED</p></td>
<td class="enum_member_description">
<p>Message indicating a <a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a> was added to
    a <a class="link" href="gstreamer-GstDeviceProvider.html#GstDeviceProvider" title="struct GstDeviceProvider"><span class="type">GstDeviceProvider</span></a> (Since: 1.4)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-DEVICE-REMOVED:CAPS"></a>GST_MESSAGE_DEVICE_REMOVED</p></td>
<td class="enum_member_description">
<p>Message indicating a <a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a> was removed
    from a <a class="link" href="gstreamer-GstDeviceProvider.html#GstDeviceProvider" title="struct GstDeviceProvider"><span class="type">GstDeviceProvider</span></a> (Since: 1.4)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-PROPERTY-NOTIFY:CAPS"></a>GST_MESSAGE_PROPERTY_NOTIFY</p></td>
<td class="enum_member_description">
<p>Message indicating a <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject-struct"><span class="type">GObject</span></a> property has
    changed (Since: 1.10)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-STREAM-COLLECTION:CAPS"></a>GST_MESSAGE_STREAM_COLLECTION</p></td>
<td class="enum_member_description">
<p>Message indicating a new <a class="link" href="gstreamer-GstStreamCollection.html#GstStreamCollection" title="struct GstStreamCollection"><span class="type">GstStreamCollection</span></a>
    is available (Since: 1.10)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-STREAMS-SELECTED:CAPS"></a>GST_MESSAGE_STREAMS_SELECTED</p></td>
<td class="enum_member_description">
<p>Message indicating the active selection of
    <a href="gstreamer-GstStream.html#GstStream"><span class="type">GstStreams</span></a> has changed (Since: 1.10)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-REDIRECT:CAPS"></a>GST_MESSAGE_REDIRECT</p></td>
<td class="enum_member_description">
<p>Message indicating to request the application to
    try to play the given URL(s). Useful if for example a HTTP 302/303
    response is received with a non-HTTP URL inside. (Since: 1.10)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-DEVICE-CHANGED:CAPS"></a>GST_MESSAGE_DEVICE_CHANGED</p></td>
<td class="enum_member_description">
<p>Message indicating a <a class="link" href="gstreamer-GstDevice.html#GstDevice" title="struct GstDevice"><span class="type">GstDevice</span></a> was changed
    a <a class="link" href="gstreamer-GstDeviceProvider.html#GstDeviceProvider" title="struct GstDeviceProvider"><span class="type">GstDeviceProvider</span></a> (Since: 1.16)</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-MESSAGE-ANY:CAPS"></a>GST_MESSAGE_ANY</p></td>
<td class="enum_member_description">
<p>mask for all of the above messages.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstStructureChangeType"></a><h3>enum GstStructureChangeType</h3>
<p>The type of a <a class="link" href="GstMessage.html#GST-MESSAGE-STRUCTURE-CHANGE:CAPS"><code class="literal">GST_MESSAGE_STRUCTURE_CHANGE</code></a>.</p>
<div class="refsect3">
<a name="GstStructureChangeType.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-STRUCTURE-CHANGE-TYPE-PAD-LINK:CAPS"></a>GST_STRUCTURE_CHANGE_TYPE_PAD_LINK</p></td>
<td class="enum_member_description">
<p>Pad linking is starting or done.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-STRUCTURE-CHANGE-TYPE-PAD-UNLINK:CAPS"></a>GST_STRUCTURE_CHANGE_TYPE_PAD_UNLINK</p></td>
<td class="enum_member_description">
<p>Pad unlinking is starting or done.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstStreamStatusType"></a><h3>enum GstStreamStatusType</h3>
<p>The type of a <a class="link" href="GstMessage.html#GST-MESSAGE-STREAM-STATUS:CAPS"><code class="literal">GST_MESSAGE_STREAM_STATUS</code></a>. The stream status messages inform the
application of new streaming threads and their status.</p>
<div class="refsect3">
<a name="GstStreamStatusType.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-STREAM-STATUS-TYPE-CREATE:CAPS"></a>GST_STREAM_STATUS_TYPE_CREATE</p></td>
<td class="enum_member_description">
<p>A new thread need to be created.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-STREAM-STATUS-TYPE-ENTER:CAPS"></a>GST_STREAM_STATUS_TYPE_ENTER</p></td>
<td class="enum_member_description">
<p>a thread entered its loop function</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-STREAM-STATUS-TYPE-LEAVE:CAPS"></a>GST_STREAM_STATUS_TYPE_LEAVE</p></td>
<td class="enum_member_description">
<p>a thread left its loop function</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-STREAM-STATUS-TYPE-DESTROY:CAPS"></a>GST_STREAM_STATUS_TYPE_DESTROY</p></td>
<td class="enum_member_description">
<p>a thread is destroyed</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-STREAM-STATUS-TYPE-START:CAPS"></a>GST_STREAM_STATUS_TYPE_START</p></td>
<td class="enum_member_description">
<p>a thread is started</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-STREAM-STATUS-TYPE-PAUSE:CAPS"></a>GST_STREAM_STATUS_TYPE_PAUSE</p></td>
<td class="enum_member_description">
<p>a thread is paused</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-STREAM-STATUS-TYPE-STOP:CAPS"></a>GST_STREAM_STATUS_TYPE_STOP</p></td>
<td class="enum_member_description">
<p>a thread is stopped</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstProgressType"></a><h3>enum GstProgressType</h3>
<p>The type of a <a class="link" href="GstMessage.html#GST-MESSAGE-PROGRESS:CAPS"><code class="literal">GST_MESSAGE_PROGRESS</code></a>. The progress messages inform the
application of the status of asynchronous tasks.</p>
<div class="refsect3">
<a name="GstProgressType.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GST-PROGRESS-TYPE-START:CAPS"></a>GST_PROGRESS_TYPE_START</p></td>
<td class="enum_member_description">
<p>A new task started.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PROGRESS-TYPE-CONTINUE:CAPS"></a>GST_PROGRESS_TYPE_CONTINUE</p></td>
<td class="enum_member_description">
<p>A task completed and a new one continues.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PROGRESS-TYPE-COMPLETE:CAPS"></a>GST_PROGRESS_TYPE_COMPLETE</p></td>
<td class="enum_member_description">
<p>A task completed.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PROGRESS-TYPE-CANCELED:CAPS"></a>GST_PROGRESS_TYPE_CANCELED</p></td>
<td class="enum_member_description">
<p>A task was canceled.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GST-PROGRESS-TYPE-ERROR:CAPS"></a>GST_PROGRESS_TYPE_ERROR</p></td>
<td class="enum_member_description">
<p>A task caused an error. An error message is also
         posted on the bus.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="GstMessage.see-also"></a><h2>See Also</h2>
<p><a class="link" href="GstBus.html" title="GstBus"><span class="type">GstBus</span></a>, <a class="link" href="gstreamer-GstMiniObject.html#GstMiniObject" title="struct GstMiniObject"><span class="type">GstMiniObject</span></a>, <a class="link" href="GstElement.html" title="GstElement"><span class="type">GstElement</span></a></p>
</div>
</div>
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